Velvet Black Models. Features. Front panel left to right Two channels, four inputs two low, two high, two volume knobs one for each channel, treble and bass controls, reverb control, tremolo speed and intensity controls, and standby switch also has green and red lamps, green for operate mode, red for standby mode VERY COOL. Rear panel left to right Acc. Trem Reverb jacks for footswitches. Ukulele History Vintage Ukuleles Questions, Answers, and Information 2007 Archive. Laction des cordes, cestdire leur hauteur par rapport au manche et la distance qui spare la corde de la frette est un rglage essentiel pour pouvoir. Since serial numbers werent introduced until 1898, approximate dating of the earlier guitars can be accomplished by knowing when Martin made changes to their labels. Vintage Instruments Guitars, Banjos, Mandolins, Dobros, Lap Steels. YBA 1 Bass Master with reverb and tremolo. It does NOT have a master volume, middle or presence controls. Huge Hammond transformers produce 4. CA7sEL3. 4s, six 1. AX7s. output speaker impedence is 8 ohms. Mine is an early model YSR 1, with a choke tranny. I believe it is from 1. The rectifier is solid state. The amp cabinet is the rounded corner type, not the pop top style. My amp was made in January 1. I have re installed a 2. H choke where the originals had one. The advantage is that it still retained a reverb driver transformer. It seems incredibly more of a tonnally versatile amp than some would like to claim, though. Because it has active tone circuitry as opposed to front panel Fenders, Marshalls, Hiwatts and most old amps with a Middle control, the frequencies are actually changed as you dial in more Highs or Lows. In other words, the Highs and Lows arent a fixed frequency that gets cut as the dial is turned down. Its a healthy 5. W, but the gange on the 4. M volume pots is very drastic Im pretty sure you can push 5. W out of it with volume on 1 and a half on the bassy channel channel I. The older ones dont have the chrome molding but do have both a red and green light indicating the status on the front. Silvery grey grille cloth. Dimensions 2. 3 x 1. There must be some mod options available for the YSR 1, with six 1. AX7s. Mods on this amp are the power supply filter choke, a 3 prong AC cable, an appropriate output transformer and the ground switch converted to an impedance selector. The tremelo is kinda nice but more of a novelty it not really about the features it about TONE Sound. Punk and alternative with Boss distortion pedal. This is the best clean sounding amp Ive had. It has crystall clear highs and bassy lows and sounds excellent with the cab I use a 2. Watt i think with 4x. Very clean, almost sterile at moderate volumes. Not as pleasing as the classic Fender. At higher volumes, it breaks up nicely with a Marshally roar when played through. Celestion speakers. I play classic rock and dont need much distortion so it sounds fine for my needs. What a killer ampIt was pretty loud even with the volume at 2 the band that. So who says only Fender has the market. The bright channel is really bright, almost. I drive this amp with a quality older 1. AX7 driver stomp box and this thing just sings with sweet rich compressed distortion. I bought a Marshall 6. I got this. and only rate the Marshall better because I dont need a 1. AX7 drive box to get the same sound. On the other hand, the YSR 1 has a sweeeet internal reverb and the Marshall. The original schematic was still inside and the latest revision date on it says Jul. YSR 1 Custom Reverb Tube Amp Head. It does sound GREAT and has not given me any problems. I also own a 6. 8 or 6. YSR 1 Custom Reverb, which does have a choke tranny, and other features, such as reverb and tremolo. But the tone is not as good as the Bass Master, unless you wind it up. I find YSR 1 tone to be very tight, compressed, and slightly sterile which is good with effects. Keep in mind, however, my YBA 1 runs on 6. L6s and the YSR 1 runs on EL3. Both the YBA 1 and YSR 1 each have 4 input jacks, so I can jumper the channels and use both the bright and normal volumes to adjust my tone. This really works great The tonal difference between the YSR 1 and the YBA 1 is huge, IMO. But the YSR 1 has a good vibe of its own. I drive mine with a TS 9 Tubescreamer into a Marshall GuvNor original issue and through a Boss DD 3 delay. The sound is tight and in your face. Great for hard. rockmetal. OTOH, running these same effects into my YBA 1 gives a wetter and rounder tone good for blues, rock, and chicken pickin. My late sixties YSR 1 sounds pretty clean. it is a great amp. Mine sounds OK but Id like a little more drive, and maybe better reverb. I put a small bypass cap on one channels preamp cathode. Definitely moving in the right direction. I put a 1 meg volume pot in. That gives you more control over the volume at lower levels. I also revoiced the channels along Marshall lines A 1. I replaced the. 0. I dont think you can do too much about the reverb. It will never be a Fender. With a 2x. 12 or 4x. Stick a pedal in front for overdrive, this baby stays pretty clean until its really loud. The amp is very loud and very clean. I was looking for a more Marshally tone so I modded mine cascaded the channels so I have one channel stock two 1. Ax. 7 preamp stages and one which has three 1. AX7 stages configured similar to some of the later Marshall amps. I also added a master volume, channel switching, put a proper grounded plug on it and fused the output transformer primary. The new channel sounds great, very Marshally and has killer vintage tones thru Celestion Vintage 3. I have run this amp through a Marshall 1. Lee M. stated earlier, but I find that using a jumper cable to. The amp begins to warm up around with the volume at 2 3. The tone controls are not too effective, but they get the job done like a Marshall. A mid control might be a nice addition, but I can live without it, and I want to keep this amp as original as possible. The reverb is adequate, and the trem is very nice. I noticed the power tubes pulsing along with the tremI have not cranked it much yet, but it is pedal friendly. I have run a Boss OD 1 and tube distortion pedals into it with excellent results. Chorus, flanging, phasing, and digital delay sound very warm and clear. There is no master volume. This amp will distort at higher volume levels, but that is TOOO loud for my basement so I use a distod pedal to do this. I like the transparency this amp has with pedals, so I find it very flexible. The amp is quiet, and sounds very woody with my 7. Stratocaster, thus representing my guitar properly. It does the Chris Isaak Wicked Game thing very well. I would not recommend this amp for heavy metal, unless an outboard distortion device were used. But I really appreciate how it reproduces my guitar tones. I would rate it higher if it were not as sterile sounding at lower volumes. Rocks out for just about ANY style of music. I wish it had a mid potknob not that it really needs it, but I use this amp in my home studio and at large venues and club gigs. It is more powerful than I will ever need it to be. It Wails. Its sounds kick ass all around. Its very clean. You get a great blues distortion sound without using any effects. For effects I have all 2. Danelectro Pedals daisy chained and secretly rigged so I still have a strong amp signal. These work like a dream with this amp. This is an abolutly great amp. Good for Stray Cats style rockabily to outright rock and roll. I use it with a 9. Strat and 8. 1 Gibson Sonex 1. No master volume so put a good overdrive in front of it and it sings. For rhythm I have a simple Boss OD 2 and lead a Vox Dist Booster. Works great, from CCR to Bad Co. Sabbith. Tweeking the nobs is a little different with the dependant tone control. Reverb sounds good but gets spooky when turned up.