Swap
Swap
Harley Benton BZ-4000 II
Ibanez GSRM20
VS
Playability
78
Sound
83
Build
65
Value
80
Score
75
FIND IT ON:
Thomann logoSweetwater logoMusician's Friend logo
Playability
73
Sound
78
Build
59
Value
85
Score
70
FIND IT ON:
Sweetwater logoMusician's Friend logoAmazon logo
Add to Compare
Add to Compare
Add more to comparison
Show Full Spec Comparison
Harley Benton BZ-4000 II vs Ibanez GSRM20 Specs Comparison
Harley Benton BZ-4000 II Ibanez GSRM20
General
Brand: Harley Benton Ibanez
Year: 2023 2020
Configuration: HH PJ
Strings: 4 4
Made in: Indonesia Indonesia
Series: Deluxe miKro
Colors: Natural White, Sunburst, Black, Blue, Brown, Red, Purple
Left-Handed Version: No Yes
Body
Type: Solid Body Solid Body
Body Material: Mahogany / Ash / Mahogany / Ash Poplar
Bridge: Sung-Il BB-104 B10
Neck
Neck Joint: Neck-Through Bolt-On
Tuners: Black tuners Ibanez
Fretboard: Ebony Jatoba
Neck Material: Canadian maple Maple
Decoration: White dot inlay
Scale Size: 34.016" 28.6"
Shape: Bass C Bass GSRM4
Frets: 24 Medium Jumbo Nickel Silver 22 Medium Nickel Silver
Fretboard Radius: 15.75" 12"
Nut: Graphite Plastic
Nut Width: 40mm (1.575'') 38mm (1.496'')
Electronics
Bridge Pickups: Tesla Soapbar TV-SBL1-4B (Humbucker / Passive) Dynamix J (Single Coil / Passive)
Middle Pickup:
Neck Pickup: Tesla Soapbar TV-SBL1-4N (Humbucker / Passive) Dynamix P (Single Coil / Passive)
Switch: 0 Way 0 Way
Knobs: Dome Dome
Pickup Mods: Coil Split None
Volume Controls: 2 2
Tone Controls: 3 1
Hardware
Strap Lock: No No
Hardware Color: Black Chrome

Reasons to Get
Harley Benton BZ-4000 II over Ibanez GSRM20

Release Year
2023 vs 2020
From a more recent year
Frets Height
Taller vs Shorter
Easier to press down strings and bend them
Nut Material
Graphite vs Plastic
Self-Lubricating nut for good tuning stability
Pickup Mods
Coil Split vs None
Splits humbuckers into single coil pickups
Neck Joint
Neck-Through vs Bolt-On
Stronger neck and easier access to upper frets
Tone Knobs
3 vs 1
More tone control
Pickups
HH vs PJ
High output without hum
Number of Frets
24 vs 22
Allows to reach higher notes
Nut Width
1.575'' (40mm) vs 1.496'' (38mm)
Less likely to mute strings by accident and more space for fingerstyle
Preamp
Active vs Passive
More versatile and customizable tonal palette than a Passive preamp
Scale Length
34.016'' (864mm) vs 28.6'' (726.4mm)
Lower action and brighter natural tone
Fretboard Radius
15.75'' (400.1mm) vs 12'' (304.8mm)
Flatter fretboard makes it easier to play single notes and bend

Reasons to Get
Ibanez GSRM20 over Harley Benton BZ-4000 II

Pickups
PJ vs HH
Balances warmth (P-style) with clarity (J-style) for diverse bass tones.
Nut Width
1.496'' (38mm) vs 1.575'' (40mm)
Favors small hands, easier bar chords and other shapes
Preamp
Passive vs Active
Doesn't require a battery, so it's more dependable
Scale Length
28.6'' (726.4mm) vs 34.016'' (864mm)
Easier bending, shorter fret separation and warmer natural tone
Fretboard Radius
12'' (304.8mm) vs 15.75'' (400.1mm)
Easier to play chords without muting strings
Value Score
85 vs 80
Better price/quality relationship

Other Key Differences
Harley Benton BZ-4000 II vs Ibanez GSRM20

Bridge Pickup
Tesla Soapbar TV-SBL1-4B vs Dynamix J
Different Bridge Pickup
Neck Pickup
Tesla Soapbar TV-SBL1-4N vs Dynamix P
Different Neck Pickup
Body Wood
Mahogany vs Poplar
Different Body Wood
Fretboard Wood
Ebony vs Jatoba
Different Fretboard Wood
Nut Material
Graphite vs Plastic
Different Nut Material

Shared Features
Harley Benton BZ-4000 II vs Ibanez GSRM20

Neck Wood
Maple
Same Neck Wood
Headstock
2-2
Same Headstock
Strings
4
Same playing style
Body Type
Solid Body
Feedback free
Switch Positions
0
Same pickups versatility
Volume Knobs
2
Same volume control
Paint Finish
Poly
Resistant paint that ages well
Bridge
Fixed
Good sustain and needs no set-up
Pickups Power
Passive
Cleaner sound and no battery needed
Neck Profile Type
C
Comfortable neck that works for most people
Type of Frets
Medium Jumbo vs Medium
You'll feel the fretboard when pressing down the strings

Common Strengths

  • Top Pickup Brand

Common Weaknesses

  • Weight Relief
  • Retainer Bar
  • High-Quality Frets
  • Compound Radius Fretboard
  • From a High-Quality-Standards Country
  • Luminescent Sidedots
  • Strap Lock
  • 21:1 Tuner Ratio
  • Active/Passive Preamp

Price History Comparison

Harley Benton BZ-4000 II Prices

SET PRICE ALERT
SET PRICE ALERT

These are affiliate links. We may earn a fee if you purchase after clicking. These prices are prone to error. Make sure you're buying the right product after clicking on a link from our site. We are not liable if you buy the wrong product after following these links. As an Amazon Associate site we earn from qualifying purchases.

Hand Size Comfortability

After taking into account the scale length, nut width, neck profile and fretboard radius, we can conclude that both are balanced for most hand sizes.

Harley Benton BZ-4000 II:
Big Hands
Small Hands
Ibanez GSRM20:
Big Hands
Small Hands

Beginner Friendliness

The Ibanez GSRM20 meets 4 out of our 6 criteria items for beginner friendliness, while the Harley Benton BZ-4000 II meets only 3. This takes into account the type of frets, scale length, nut width, bridge type, fretboard radius, and neck profile to determine the easiest combination for new players.

New Player Friendliness

Harley Benton BZ-4000 II
  • Comfortable shape
  • Tall frets
  • Comfortable neck
  • Comfortable fretboard
  • Narrow nut
  • Short scale

New Player Friendliness

Ibanez GSRM20
  • Comfortable shape
  • Tall frets
  • Short scale
  • Comfortable neck
  • Comfortable fretboard
  • Narrow nut

Sound Quality Comparison

The wood used in an electric guitar or bass is not as important to determine the final tone. However, some people prefer specific wood types, so we'll take a look at those first. Then, we'll take a look at the electronics to determine the versatility and sound quality of each instrument.

Woods Used in Both

Maple wood pattern used for guitar building
Maple

Maple is one of the most popular necks for good reasons. It is a strong wood that is relatively cheap to make and looks beautiful. The highest quality maple is the hardest that comes from North America. Find out more about Maple.

Woods Used in the Harley Benton BZ-4000 II

Ebony wood pattern used for guitar building
Ebony
Mahogany wood pattern used for guitar building
Mahogany

Ebony is a high-end wood, so it is not cheap. It's only used for fretboards because it's also very heavy. It does an excellent job as a durable material while looking elegant. Find out more about Ebony.

Mahogany is a fairly rare wood nowadays. It's used mostly for bodies due to its relatively lightweight. Gibson popularized it with their Les Paul guitars during their golden years, so this wood has a lot of good reputation behind it. The most expensive type comes from South America and it's still used by Gibson even today. Find out more about Mahogany.

Woods Used in the Ibanez GSRM20

Jatoba wood pattern used for guitar building
Jatoba
Poplar wood pattern used for guitar building
Poplar

Jatoba is a hard and dense wood that emphasizes the mid-lows, giving a fuller, more round sound than, for example, Mahogany. However, it also has a lot of clarity in the top end. Find out more about Jatoba.

Poplar is a cheaper and heavier alternative to Alder wood. It terms of tone, it emphasizes the low-end and has cutting mids. It's relatively soft compared to most body woods. Find out more about Poplar.

Winner: Harley Benton BZ-4000 II.

Pickup Configuration

The Harley Benton BZ-4000 II has an HH configuration while the Ibanez GSRM20 has PJ pickups.

Double Humbucker (HH) is the choice for people who want a fuller, more round sound with tons of mids and lows. Humbuckers also get rid of the hum noise that plague single-coil pickups. They can work out for almost any genre going from Djent to even Jazz.

On the other hand, A PJ bass offers a versatile tonal range by combining the warm, punchy sound of a Precision-style (P-style) pickup with the brighter, more articulate tones of a Jazz-style (J-style) pickup. This makes it a great choice for those seeking tonal flexibility.

Pickups Quality

Both come with very good pickups from at least one of the specialized brands in the market. With pickups like these, you probably won't need an upgrade anytime soon.

However, the Ibanez GSRM20 has a slight sound quality advantage when taking into account other factors like the type of pickups, magnet, position, etc.

Both use Passive pickups. This is what's used for most music genres. They have a regular output and will serve you for both high-gain and clean tones. The alternative (Active pickups) offer a higher output that is mostly used for heavy music.

Preamp Circuit

A preamp in an electric bass functions as an electronic circuit that acts as an interface between the bass's pickups and the amplifier. Its main purpose is to amplify and customize the bass's initial signal before it reaches the amplifier, offering enhanced control over factors like tone, volume, and sound attributes. Preamps typically come equipped with tone adjustments, equalization options, and sometimes built-in effects, empowering bass players to fine-tune their sound to suit their personal preferences and the musical environment.

The Harley Benton BZ-4000 II's preamp is Active while the Ibanez GSRM20's is Passive.

Active: Unlike passive basses, which rely solely on passive pickups and tone controls, active preamps require a power source, typically a 9-volt battery, to operate. The active preamp offers several advantages, including the ability to boost or cut specific frequencies, resulting in a more versatile and customizable tonal palette. Active basses are favored in genres where precise tonal sculpting and extended tonal options are essential, such as jazz fusion or progressive rock. However, they do require occasional battery replacement or recharging to ensure optimal performance.

Passive: A bass with a passive preamp lacks an onboard electronic circuit for tone shaping and signal boosting. Instead, it relies solely on passive pickups and basic tone controls, typically consisting of volume and tone knobs. Passive preamps don't require an external power source like batteries, making them low-maintenance and dependable. While they offer a simpler and more straightforward tonal character, passive basses are appreciated for their warm and vintage sound, often favored in genres like classic rock, blues, and funk. They are an excellent choice for musicians who value the simplicity and timeless appeal of their instrument's tone without the need for active electronic components.

Winner: Ibanez GSRM20.

Versatility Comparison

Some instruments offer you more ways to explore your creativity than others. Below you'll find how both compare when it comes to versatility.

Switch Options

Both are equal when it comes to the pickup switching option.

Only the Harley Benton BZ-4000 II comes with some kind of pickup modification: Coil Split.

Coil Split lets you disconnect one of the pickup coils. When used with humbuckers, it turns them into single-coil with lower output and cleaner tone.

When evaluating versatility, we also take into consideration bridge and neck joint type, number of frets, switch options, amount of pickups and more.

Winner: Harley Benton BZ-4000 II.

Final Sound Quality Scores

Harley Benton BZ-4000 II
Pickups 90
Sustain 70
Versatility 91
Tuning Stability 80
Sound 83
Ibanez GSRM20
Pickups 100
Sustain 60
Versatility 77
Tuning Stability 75
Sound 78

Build Quality Comparison

When it comes to build quality, we like to take into account everything used to build the instrument. This includes materials, hardware and the quality control expected depending on the country where it was built. Let's see how the Harley Benton BZ-4000 II compares to the Ibanez GSRM20.

Country of Origin

The manufacturing country can tell a lot about the build quality of an instrument. Both in this comparison where made in Indonesia.

Indonesia is becoming the most popular country for guitar building because they can make good instruments for a low price. Some people think that they're 'the new China' when it comes to build quality. But the truth is that Indonesian guitars are more consistent, although Chinese quality has improved a lot in the last few years.

Winner: Tie

Nut Material

If you want your bass to stay in tune and sound good, you need a well cut nut. Nut quality can be inconsistent even when comparing two copies of the same model. The best way to make sure you're nut will be well done is by getting a nut made by an expert company like TUSQ or Micarta.

The Harley Benton BZ-4000 II has a Graphite nut. It's a self-lubricating material that will allow the strings to slide over the nut without a lot of friction. It's a good type of nut if you want to have better tuning stability than with plastic, although it's not as resistant as Bone or Tusq.

On the other hand, the Ibanez GSRM20 comes with a Plastic nut. This is a low-quality nut that you might want to consider upgrading soon. Bone and TUSQ nuts are the best for guitars with a fixed or simple tremolo bridge.

Winner: Harley Benton BZ-4000 II.

Fret Material

Most fret wire is made of nickel silver. This material eventually wears down after a lot of use and most instruments end up needing a complete fret replacement. However, some expensive models come with stainless steel frets. This is what you should aim for if you can afford it.

Unfortunately, none of them come with stainless steel frets.

Winner: Tie.

Tuners

Both come with regular tuners. The Harley Benton BZ-4000 II's are Black tuners while the Ibanez GSRM20's are Ibanez

Winner: Tie.

Neck Joint

Contrary to popular belief, the difference in sustain and tone that some neck joints give to a bass is simply unperceivable—if they're all well built. However, some of them do have advantages over the others.

The Harley Benton BZ-4000 II has a Neck-Through neck joint. This neck is a lot more resistant and lets builders give the neck joint a more comfortable shape for soloing at the upper frets. The disadvantage is that they're more expensive and that if you damage your neck, you can't simply replace it like with bolt-on necks.

On the other hand, the Ibanez GSRM20 comes with Bolt-On neck joint. This neck is joined to the body by 4 bolts that you can simply unscrew. This allows you to replace the neck or take it off for travel. It's the most common and cheapest way to build a guitar.

Winner: Harley Benton BZ-4000 II.

Here is the list of features that were considered when choosing the winner in the Features subcategory:

Strengths & Weaknesses
Harley Benton BZ-4000 II
  • Expensive Wood
  • Top Brand Pickups
  • Neck-Through Build
  • Coil Split Pickups
  • Active Preamp
  • Cheap Fret Wire (NS)
  • No Locking Tuners
  • Made in Indonesia
  • No High-Quality Nut
  • No Weight Relief
  • No Luminescent Inlay
  • No Compound Radius Fretboard
  • No 21:1 Tuner Ratio
  • No Retainer Bar
  • No Strap Lock
Strengths & Weaknesses
Ibanez GSRM20
  • Top Brand Pickups
  • Cheap Fret Wire (NS)
  • No Locking Tuners
  • Made in Indonesia
  • No Expensive Woods
  • No High-Quality Nut
  • No Neck-Through Build
  • No Push Knob or Extra Switch Option
  • No Weight Relief
  • No Luminescent Inlay
  • No Active Preamp
  • No Compound Radius Fretboard
  • No 21:1 Tuner Ratio
  • No Retainer Bar
  • No Strap Lock

Final Build Quality Scores

Harley Benton BZ-4000 II
Quality of materials 41
Features 85
Quality Control 70
Build Quality 65
Ibanez GSRM20
Quality of materials 41
Features 70
Quality Control 65
Build Quality 59

Playability Comparison

Let's now compare their playability. Bear in mind that the instrument will feel different depending on your hand size and play style. That's why you should always test before buying. But if you can't or want a second opinion on it, we can still take a look at each of the important measurements of the instrument for you. This way, we can predict how easy a bass might be to play, or how different it will feel compared to the other.

Remember that, even though the difference might seem small, every inch counts when it comes to feeling of the instrument in your hands. Any variation can completely change how comfortable a bass feels in your hands.

Nut Width

Harley Benton BZ-4000 II Nut Width
Harley Benton BZ-4000 II Nut Width
Ibanez GSRM20 Nut Width
Ibanez GSRM20 Nut Width

The nut width will affect the separation between strings at the nut. In this comparison, the Harley Benton BZ-4000 II has the wider nut with 40mm (1.575'') vs 38mm (1.496''). This is a 2mm (0.079'') difference

This means that it will be more difficult to do bar chords on the Harley Benton BZ-4000 II, especially closer to the nut. However, it's also easier to play without muting strings accidently. This favors people with big hands.

Scale Length

Harley Benton BZ-4000 II's Scale Length
Harley Benton BZ-4000 II's Scale Length
Ibanez GSRM20's Scale Length
Ibanez GSRM20's Scale Length

The scale length is one of the things that influences playability the most. This is the distance between the nut and the bridge and will affect everything from low action allowance, difficulty to perform bends, fret separation, and even tone.

The Harley Benton BZ-4000 II has the longest scale: 34.016". The Ibanez GSRM20 is only 28.6" long. This is a 5.416'' (137.6mm) scale length difference.

This longer scale means that the strings need more tension to get in tune. This is good if you want to avoid fret buzz, which can happen when the strings are too loose and touch the frets while vibrating. This is especially important when playing in lower tunings. This will also let you reduce the gap between fretboard and strings (low action) to make them easier to press down. However, this higher tension will also make it harder to perform bends and vibratos as the strings will feel stiffer.

This also means that the frets have a longer separation between each other, so this will make it harder for people with smaller hands when playing some chord positions.

Another characteristic of a longer scale is that it makes the bass sound 'snappier' or brighter. This is due to the extra separation between harmonics and overtones produced by the tension. This influences tone more than any other factor (except the pickups).

Lastly, remember that you can also affect the tension of the strings by changing your string gauge. You can use a thicker gauge for more tension and a lighter one for less tension.

Neck Profile

Harley Benton BZ-4000 II Neck Profile
Harley Benton BZ-4000 II's neck profile
Ibanez GSRM20 Neck Profile
Ibanez GSRM20's neck profile

No single neck shape is better than others. However, most people tend to prefer a thinner necks because it doesn't get in their way when playing fast and most hand sizes can adapt to it pretty well. However, some people still prefer thicker necks for a better grip, especially if they have big hands.

Both the Harley Benton BZ-4000 II and the Ibanez GSRM20 have a C-shaped neck. This is what you'll find in most modern guitars. Most people feel like the thickness of a C neck is simply the less intrusive one for playing fast, while at the same time allowing you to grab the neck easily for resting if you want to.

Fretboard Radius

Harley Benton BZ-4000 II Fingerboard Radius
Harley Benton BZ-4000 II's Fingerboard radius
Ibanez GSRM20 Fingerboard Radius
Ibanez GSRM20's Fingerboard radius

Most bass fretboards are not flat; they usually have a curve or arc across their width. A curved fretboard will make it easier to perform chords without muting strings, while a flatter one will make it easier to play single notes, which is good for bending and soloing in general. The best fretboards have a compound radius that varies across the fingerboard, but they're not common since they take a lot more work to build.

In this case, the Ibanez GSRM20's fingerboard radius is smaller, which means it's more curved than the Harley Benton BZ-4000 II's. This extra arc will make playing chords easier in this model. You won't be as likely to mute the strings, especially if you have big hands. However, playing single notes and bending will be easier on the Harley Benton BZ-4000 II.

Still, both tend to favor soloing over chords, so if you're looking for a guitar for playing rhythm, you might want something else with a radius closer to a Stratocaster's 9.5''.

Fret Size

Harley Benton BZ-4000 II Frets Size
Harley Benton BZ-4000 II's Frets Size
Ibanez GSRM20 Frets Size
Ibanez GSRM20's Frets Size

The Harley Benton BZ-4000 II has Medium Jumbo frets, which should be taller than the Ibanez GSRM20's Medium frets.

Some people prefer taller frets because they result in more sustain since the strings get pressed cleanly without interference from the fretboard. However, if they're too tall—like Jumbo frets—, you might change the pitch of the strings accidentally if you press too hard because you won't be touching the fretboard with your fingers. This is also why some guitarists with a heavy grip prefer smaller frets. They like to feel the fingerboard to avoid pressing down too hard and getting out of pitch.

Final Playability Scores

Harley Benton BZ-4000 II
Bending & Vibrato Ease 75
Chord Playability 70
Solo Playability 90
Playability 78
Ibanez GSRM20
Bending & Vibrato Ease 90
Chord Playability 60
Solo Playability 70
Playability 73