Vintage sound amps modS
Vintage 15, 20 & 22SC
VINTAGE 15 & 20
1) The most obvious difference is the 12" speaker upgrade. The Princeton Reverb came with a 10" stock speaker, and many people modded them to replace the 10" baffle with a 12" so they could get a standard sized speaker in there.
2) The reverb circuit is vastly upgraded. The stock reverb on a Princeton was a small 9" pan spring reverb. Both The Vintage 15 and 20 uses a large 17" spring reverb pan that's the same size as the one used in the Twin Reverb! The reverb circuit also includes a very nifty reverb dwell control on the rear of the chassis for varying the decay time.
3) A "MIDDLE" tone control has been added that Princeton Reverb amps didn't have. This addition does nothing to hurt the integrity of the circuit or tone. The original Fender circuit actually had a "fixed mid" that was set permanently at 6.8k. Vintage Sound removed this resistor from the circuit and replaced it with a much more versatile 10k pot. You now have the ability to adjust this frequency range without compromising the original tone. If you want it to sound precisely like a blackface Princeton Reverb, just turn the port to around one o'clock on the dial and you're there. You want to scoop the mids a touch, pull back. Warm the tone a bit, turn up.
4) The addition of a Standby Switch. The original Princeton Reverb didn't have one. This one does.
Vintage 15 utilizes a 5AR4 rectifier instead of a 5Y3. This bumps the wattage a bit (from approx 12 watts to approx 15). Accordingly, Rick added grid and screen resistors (as seen in the Black Face AB763 circuitry). This gives the transformer more protection in case a tube fails catastrophically.
The output transformer has been upgraded and beefed up to give you 20 watts (instead of 12 in a stock Princeton Reverb) so it has a good bit more clean headroom on tap than a vintage PR. This also allows you to change out the power tubes to 6L6's for a different tone and response. Overall, we recommend staying with 6V6 tubes, but the 6L6 tubes will deliver slightly more bass, but will be a bit more stiff in response. Stiffness isn't a bad thing if that's what you are going after, but the majority of people will prefer the slightly softer response of the 6V6 tubes. Naturally, your mileage may vary.
6) External Bias Points have been added so as to more easily bias the amp when you swap out tubes. This was previously an upcharge, but from 2017 these are now included on the Vintage 15 and 20.
1) One thing you'll notice is the addition of a "MIDDLE" tone control. This, of course, was not on the original Deluxe Reverb. So, why did Vintage Sound decide to add it in? Well, first of all, it absolutely does nothing to hurt the integrity of the circuit or tone. The original Fender circuit actually had a fixed "MIDDLE" that was set permanently at 6.8k. Vintage Sound removed this resistor from the circuit and replaced it with a much more versatile 10k pot. The result is you now have the ability to adjust this frequency range without compromising the original tone. If you want it to sound precisely like a 65 Deluxe Reverb, just turn the pot to around 6-7 and you're there. If you want to scoop the mids a touch, pull back. Warm the tone a bit, turn up.
2) As mentioned above, the original circuit was somewhat bright. Many people used to pull the chassis and clip the bright cap allowing a darker tone from their amp. Others, on the other hand, liked it bright. We've eliminated the hassle by including a "bright cap defeat" switch. Flip it to Bright for the original tone, or flip it to dark to essentially "clip" the bright cap.
3) Also included is a very nifty reverb dwell control which is on the rear of the chassis. Obviously, this too was omitted on the original circuit, but it comes in quite handy for adjusting the amount of decay the reverb has. Very nice!
4) Another smart alteration is the incorporation of a Diaz based tremolo mod and a newly designed oscillator unique to Vintage Sound Amps. This accomplishes a few things... You'll notice the Vibrato has the ability to be slower than stock Fenders. The vibrato being too fast was always a complaint people had with vintage Fender Deluxe amps (and still do to this day). The other advantage this gives is when you turn the dial all the way down, you switch off the vibrato circuit, bypassing it and leaving you with a cleaner, more pure signal. The result is a slightly more present tone, and a bit of a bump in volume. Furthermore, with the older Deluxe Reverbs, you can hear a "ticking" sound with the vibrato. This is caused by several design flaws in the original circuit allowing the LFO signal to leak into the audio path. These issues have been addressed with a Vintage Sound specifically designed photo-cell tremolo, better routing of the wires, superior components, and filtering of the oscillator output.
5) External Bias Points have been added so as to more easily bias the amp when you swap out tubes. This was previously an upcharge, but from 2017 these are now included on the Vintage 22sc.