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Ampeg PF-500 vs Mesa D800+

TRICKFISH OR GENZLER (consider Genzler designed the mesa)

To clarify this (before it gets all twisted around), While I designed the Mesa Subway line, I did not design any of Genzler's amps, nor did Jeff design any of Mesa's amps.
 
I am a fan of some Ampeg products and pretty much anything Mesa. The PF-350 I had was grossly underpowered unless the Master was dimed and even then, it sounded like a good 100 watt amp. My old 85 watt 1967 Dual Showman into the same 4 ohm cabinet totally annihilated the PF-350.

I bought my Mesa D800 when they first came out, before the D800+ was in production. I absolutely love the way it sounds, it has more power than I will ever use and achieving "my" sound is a simple process as it has a built-in high pass filter, no knob needed. That amp, with a Mesa Subway 1x12 and 1X15, just plain works and if you don't play big venues, the Subway 1x15 by itself is plenty.

A few months ago I replaced the PF-350 with an Ampeg SVT 7PRO. If you prefer the "Ampeg sound", that is the one I would recommend although it is more expensive than the PF-series Ampegs. But if you try one out, you will see why. I use it with an Ampeg 1x15 cabinet and it is an outstanding rig that nails the classic Ampeg SVT sound in a much smaller, lighter package. The built-in compressor is a nice feature, too.

But between the two, I still like my D800 better. If you enjoy tweaking knobs and are after some additional high end sparkle, try the D800+ as it is only $100 more. And if possible, it is a good idea to test drive whichever amp you are considering before handing over the cash or credit card.
 
If you choose the Mesa, spend the extra 100 bucks and go for the 800+ so YOU can define your mid-freq points and boost/cut them as you like. When people say the Ampeg has a baked-in tone, it's because of the frequencies THEY pick. To many they're just right for old-school bass tone. To others it's limited. I have a PF-350 and I like the tone but it is what it is. You should be able to find tones very close with the 800+ but you can get plenty others, plus more power of course.
 
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I am 100% in agreement with you about the value of sweepable freq centers.

However, if you play through a V4 and a V4-B there are difference in their mid frequencies but they sound near enough to the same thing if you add a little more or less to the mid knob. I think the baked in tone is more than just the frequencies on the selector.

That said I would LOVE a V4-B or (real) SVT with a sweepable mid mod.
 
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I know 1x15 is the 'Golden Child' of Subway line for a lot of TB'ers and for good reason

But I believe you might want to listen to 2x10 Subway; to my ears it sounds somewhat Vintage[Ampegish] compared.

This might help; there are other video comparison but Mesa seems to use Avant-garde players in demo's:)

 
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I’ve got my sites set on an Ampeg PF-500 with a PF-115HE .... I did see the Mesa Subway D800 and 800+ there. I was just curious what the deal is with those? Can they nail that peg tone too?

To answer the original 4 y.o. question, I own a PF-800 and a Subway D800. To my ears they do not sound much alike - the PF-800 has Ampeg tone built in from the get go. Just plug in, turn on, and it's there (although I have no experience with the PF-500). The Subway can get dirty but it's a much more refined sound IMO, and also more versatile - but that could be because I fiddle with it more and don't tweak the Ampeg as much since the tone I want from it is easy to dial in; set it and forget it.

I would not consider the Subway D800 to be a substitute for the Ampeg sound, but I'm not familiar with the D800+ so it may get closer than the D800.

If you want Ampeg sound, just get Ampeg - the PF-800 delivers.