NAD: 1968 SF Fender Pro Reverb!

riffmeister

Member
Messages
16,815
Really nice condition overall. Cool Drip Edge cosmetics. Reminds me of my drip edge Super Reverb that I bought new "back in the day"! :)

Some of the circuit had started the transition to Silverface specs in this late 1968 amp, but the previous owner had the amp converted to Blackface specs. I'm no techie, but the mods look to have been done very nicely, and with quality components. Real nice tube compliment, too: two RCA 7025's, Telefunken ECC83, two Telefunken ECC81's, GE 6L6GC power tubes, and a JJ GZ34 rectifier.

I gave the amp a good demo today, about an hour in the basement. The original speakers were reconed in 2005, but the amp came loaded with newer Eminence RW&B and Texas Heat speakers in it, which are the speakers I used in the demo. I was using my long time friend, a 2004 Suhr Standard with s/s/h pickup configuration.

The amp's noise floor is very low, which was nice to hear (or not hear, as the case may be!) when I first turned it on. Both channels sound great, but I spent most of the time on the reverb channel. The reverb is fairly bright but can be dialed in for just a hint which is how I like it. With the tube compliment mentioned above, I found the amp to break up a little too early for my taste and in a somewhat 'edgy' way, but replacing V2 with a 12AY7 completely took care of that......more headroom and smoother breakup. Alternately, with the original tube compliment, I could tame the breakup by plugging into the low gain input, but there seemed to be some sacrifice in the overall tonal characterisitcs. So the 12AY7 is the way to go, for me. Settings on the reverb channel were vol 7, treb 7, bass 6, reverb 2.5 with the bright switch off.

The sound is classic 60s Fender......I've been experimenting with BF-Fender inspired boutiques for the last few years (Carr, Tone King, Bruno, D. Z, VVT) and this Pro Reverb just 'out-Fenders' them all! :D It's not as mid-scopped as I was thinking it might be, it has a very nice upper mid presence that really makes the B & E strings sing. I tested my two OD pedals with the amp, Fulldrive2 and Zendrive, and they both sound good but I think I prefer the Fulldrive2. If nothing else, the FD2 definitely cleans up better with the guitar's volume control.

Anyway, just thought I'd share. And I'm looking forward to trying this one with the band!
 

riffmeister

Member
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16,815
pic in the afternoon sun:

1968ProReverb001b.jpg
 

blackba

Silver Supporting Member
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12,533
Wow that Pro Reverb is super clean. I am impressed that you were able to crank it to 7 in your basement, I very rarely get my BMR up that loud. :(
 

riffmeister

Member
Messages
16,815
There is a noticeable volume drop with the 12AX7 to 12AY7 switch......the amp is starting to open up at around 5 on the volume and at 6-7, the amp is just reaching edge of distortion, which is where I like to live. 6-7 should be a good volume with my band in a medium size room.

We shall see! :D
 
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smolder

Gold Supporting Member
Messages
15,123
If you replace the 6.8k resistor to ground on the back of the bass pot with something around 4k you'll get a bit more scoop.
 

riffmeister

Member
Messages
16,815
Here are some remnants of the original SF circuit.......large resistor and small capacitor removed from the power tubes:

c1968ProReverbchassis001c.jpg
 

deeval

Silver Supporting Member
Messages
2,318
I have a scum-back H55 and a new Patriot Maverick,which is the variable built in attenuator speaker and it sounds great the H55 gives it some full bottom with no flab and able to bring the Maverick down to match the DB on the scum back,and that adds some great treble tones good combination.In my 68 Proreverb
 

smolder

Gold Supporting Member
Messages
15,123
Good to know.......I might do a little tinkering on this one.

You mentioned it breaks up to early... My 66 has a pull pot (intensity) that bypasses the tremolo - adds a bit more gain. I also put a mid pot in the standby hole... Oh and a pair of jbl's. A great great amp.
 

pfflam

Member
Messages
7,126
[snarky bell well deserved post removed . . . due to snarkiness]
 
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