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NAD : Hartke LH 500

Gervais Cote

Supporting Member
Oct 30, 2023
4,688
9,555
Hi bass freaks,

Just got this monster yesterday and thought I should share my opinions.

I already own two bass amp heads to feed my two GK Neo IV 112 but was looking for a louder one for bigger gigs. My primary amp was a Mesa Subway D350 and my backup is a small Traynor SB 200H.

Quite satisfied from both but they are class D so a bit generic sounding to me and I also wanted some headroom for larger shows as well as a more visceral tone and more burping on low notes.

First thing I did when I got my new amp was to open it for inspection. I found out it is a 2014 with very little use as everything is extremely clean and without any trace of overheating or abuse. The seller told me it’s been used occasionally in his room and in studio and never used it for gigs so it seems to be true.

My first impression when I started it was a rather dry sound with a midrange a bit forward with all controls at 12 o'clock. I dialed the mids down to 10 o’clock and got a better frequency response. I realized though that this amp is a class A preamp and a class A/B amp so it takes a few songs to warm up and that exactly what happened after 10 minutes.

One of the things that amazed me is the fact the fans very silent allowing me to use that amp as a practice equipment without any problem. In fact, I have to put my head close to it to hear the fans running. There is no hum at all and just a little mix of hiss and pink noise when I put my ear against the speaker but don’t hear it at all 2 feet away. Quite amazing to me for such a monster.

Sound wise, I would say it’s very transparent cause you hear very big sound differences when switching from one bass to another. It’s also very punchy and seems to be voiced to cut like a knife with a loud band and that’s what I was looking for. It’s really not boomy and doesn’t really bring a specific voicing letting the sound of your instrument take place. I also have the headroom I was looking for and can feel the punch in my chest even at low volume.

Very satisfied so far and this will probably become my main bass amp with my Mesa D350 or my Traynor SB 200 H as a backup now.


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Just keep in mind those amps use the old Fender style tone stack so for a 'flat EQ' setting it is somewhere around bass at 2, mids dimed to 10 and treble around 2. I used to own the LH1000 and thought it sounded really good set like this. I never used the limiter switch so can't tell you anything there.
Is it what you mean for the flat EQ : bass at 7, mids at 3 and treble at 7 ?

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Is it what you mean for the flat EQ : bass at 7, mids at 3 and treble at 7 ?
I know I'm not the TB'er who posted that, but I'm not certain what the reference for Bass and Treble was (number or clock position), but "dimed to 10" means Mids all the way up. IIRC, the Fender tone stack it's designed to mimic has a cut-only Mid tone knob. So anything below 10 (all the way up) is cutting mid frequencies. So essentially that would mean there's no way to boost mids in the EQ section.

That's IF this is indeed one-to-one with the Fender tone stack design.
 
I know I'm not the TB'er who posted that, but I'm not certain what the reference for Bass and Treble was (number or clock position), but "dimed to 10" means Mids all the way up. IIRC, the Fender tone stack it's designed to mimic has a cut-only Mid tone knob. So anything below 10 (all the way up) is cutting mid frequencies. So essentially that would mean there's no way to boost mids in the EQ section.

That's IF this is indeed one-to-one with the Fender tone stack design.

Couldn't you dial bass and treble down and bump up the master volume to effectively boost mids?
 
The LH500 does indeed have a Fender tonestack. More precisely, the preamp is essentially the Alembic tube preamp, itself a copy of a Fender preamp (I think the Dual Showman? Or one half of it?). It has been modified to be a bit more useful for bass, according to Hartke. Anyway, controls at 5 will produce a mid scoop somewhere (with the trough being somewhere between 500 and 800Hz, usually). Probably the mid scoop is not as prominent as on the original circuit since bass really doesn't lend itself to strong mid cuts usually. (A Twin Reverb with controls at noon will have like a -12dB mid cut).
 
I remember when these amps and their HyDrive cabinets first came out. The artist I was playing for also had just help launch a couple new music stores in the area. I got to demo the full lineup when they came into the store. I really liked the LH amps. Really nice hybrid of clean tube-like tone and solid state punch. I loved the simplicity of the layout. At the time, I was going for a lighter and smaller setup but definitely would have considered these. Playing in front of their 8x10 cabinet using the LH1000 was glorious. Congrats on the new amp. I bet it sounds great through those GK cabinets.
 
Nice. The LH500 is my main gigging amp in my rock cover band. I pair it up with HD112s or HD210/HD115 cabs depending on the size of the show.

It's been a rock solid workhorse. I always have a backup class D head in my bag but I haven't had to use it.

Yes, it's heavy but I'll worry about that when I get old and weak. I'd rather have something simple, loud, and reliable for now.
 
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I like the Carey Nordstrand Starlifter approach where he took the numbers off of the knobs. Set it where it sounds the way you like it.
Agreed. I just noted the OP had started with all knobs at Noon as that is (close to) flat on most bass amps….but not these. When I was originally checking out Hartke gear I went into the store and set the EQ to Noon and played through a Hydrive 410 cabinet. I thought it sounded a little scooped and not so good. I went home and through searching here and online I learned the 2-10-2 setting was pretty close to flat on these amps. I went back to the store and set it up this way and it sounded way better to me….so much so that I bought the amp and cab that day. Gigged it week in and week out for a solid 3ish years.