"The Chicago" from Mission Amps is ready.
*********************************************************************Master amp builder Bruce Collins has designed it from the ground up to to be the most exceptional and economical pro-level mid-sized harp amp on the planet. In standard form, the amp is a 2x6L6 or 2x5881 harp amp, rated very conservatively at 32 watts in fixed bias and over 20 watts in cathode bias. In fixed bias mode I've measured + 38 watts while playing through a speaker! . Here are some of the Standard 32-20 features: -32 watts at under 40 lbs. All in a modest sized late 50's Tweed Super type-size pine cabinet. Just like the originals from the 50's -Heavy duty steel chassis, powder coated in light biege with dark brown inking and knobs -All hand wired point-to-point with a hand made eyelet board, by a master amp builder. Beautifully crafted. -Every finished amp rigorously tested by pro a player. Comes with a five year limited Warranty. -Cloth-covered solid core wiring. Real vintage style wiring. -NOS military-grade Paper in Oil tone capacitors. Dark, warm, lush tone. -Very hip, DEEP Switch for fatter tone. A Mission Amps proprietary feature. -Power tubes are switchable from Fixed Bias to Cathode Biased. -Beefy high current power transformer. Powerful bottom end, Custom made in Chicago, IL. -40 watt output transformer. Custom made, large windings, vintage style open frame with paper bobbin. -Preamp is Optimized for bullet mics (including crystal), Shure SM57 and RE-10 microphones. -Separate Bass, Treble, and preamp Volume controls with remote mounted, mini switch for mic gain BOOST. -Line Out jack with level control. Perfect for PA or recording. -One 12-inch Eminence Cannabis Rex speaker. Many ther configurations now available, call for more info. -Tweed style cabinet, covered in real, brown twill tweed & light amber tinted lacquer. Solid pine carcass, finger jointed, with a high grade, floating plywood baffle board. ** The 1x12 combo only, is also available in the two tone vinyl Aurora cabinet.** The Mission Chicago 32-20, 6L6-5881 amp, 32 watt, light weight combo. All current 1x12 models will continue to include all the custom features that applied to the intro priced amplifier. Tweed 1x12 (H) 18'' x (W) 22'' x (D) 10 1/2'' @ $1139.99 Tweed 2x10 (H) 18'' x (W) 22'' x (D) 10 1/2'' @ $1249.99 Tweed 3x10 (H) 22.5" x (W) 22.5" X (D)10 3/8" @ $1379.99 Tweed 1x15 (H) 21" x (W) 22.5" X (D)10 3/8" @ $1299.99 Dimensions are approximate and all products are subject to change without notice. The larger 3x10 sized combo can host the 10" and 12" mix if a custom order is desired! Very popular. Special order of other 10" and 12" speakers or 8" speakers can be arranged too... ask. A +50 watt set of transformers is now also available for a nominal $65.00 upcharge fee and they fit all combos! Call for pricing and availability on these special order items. ******************************************************************************************** A word from from Bruce Collins, the owner of Mission Amps and creator of the Mission Chicago Harp Amps: The Chicago 32-20 is not another Bassman or any other known modified guitar amp. For this project, I used all my experience with real harpsman and vintage vacuum tube amplifiers such as; old RCA, GE, Dukane P.A.s, Premier amps, Masco amps, early Ampeg amps, tweed Bassman, Bandmasters, the Super, Pro amps and many other vintage vacuum tube amps. However, the Chicago harp amps are not a copies of any known amp... This is a true Harpman's amp, highly loaded with features dedicated to electric harp players. This is not a bedroom amp, it is a new harp amp circuit, built for serious harp players... and it rips. It has a very broad, harp friendly bandwidth and gain structure that works well with a lot of different microphones. The amp is harp-tuned and uses all standard easily found vacuum tubes... there is no where to go but ^UP^ with NOS tubes if a player is so inclined. For various gain and tonal tunings, any 12AX7, 12AY7, 12AT7, 5751, 5965, 12AV7, or 12AU7 can be used in the preamp stages. Even a 12DW7 may be used in the first preamp stage if you so desire. Some players are finding with their style and mics the amp sounding better to them when using various preamp tubes so I encourage you to experiment with preamp tube combinations... it will not effect the warranty!! The standard design uses two matched Russian or JJ, 6L6s or 5881 power tubes, a reissue GZ34 rectifier and two 12AX7 preamp tubes. The new powder coated chassis has a top mounted toggle switch to operate the power tubes in fixed bias or hotter cathode biasing. Cathode biasing reduces the absolute output power by about 25% but it has a crunchier vintage tone and overdrive that is wonderful, while fixed bias makes the most amount of absolute power and is more feedback resistant. Fixed bias is also a little snappier with more aggressive punch. Included on the top chassis: On-Standby-Off switch, Line Out jack with level control, Treble control, Bass control, Volume control, the exclusive Mission DEEP switch and two input jacks, 5meg high sensitivity and 100K lower sensitivity. The GZ34 and two 5881s or 6L6s ... nets you anywhere from 22 watts to +32 watts of "clean output power", again, depending on the combinations and fixed bias or cathode bias. NOTE: The amp must be placed in standby before switching power tube biasing options! Peak power of the 32-20, in fixed bias, with two 6L6s and a GZ34 rectifier, is about 38-40 watts. AMAZINGLY however, ... with a simple exchange of two 6V6s and NOS 5Y3GT rectifier tube, the amp sounds wonderful at nealry half power (11w to 16w) and there is no bias to adjust... independent of fixed bias or cathode bias!! Let me sate that again: Yes, the Chicago 32-20 amp can be run with a NOS 5Y3GT rectifier and two matched 6V6s for about 11-16 watts output, depending on which way you flip the power tube biasing switch and with no other changes. It is Plug and Play. When used with the 6L6-5881 type power tubes, you can also use any normal octal socket rectifier such as: 5Y3GT, 5R4, 5U4G or GB, 5V4G or GA, 5AR4, GZ30, GZ34 or a the supplied 5AR4. The combinations are many. With any of these tube changes, this allows you to continue tweaking the amp's tone and power output to your liking . What fantastic felxibility this amp offers!! Who else offers all this? Another superior custom feature of the new Chicago amp is the Mission, "Deep" switch. It cuts the harsh brittle/reedy high end and boosts the deep lows around 100Hz-350Hz (regardless of the harp's key). Those frequencies are right in the wheel house of the modern harp player's greasy, grunt tone. A fabulous feature for those single hole players! The new Deep circuit doesn't boost the overall gain or volume too much, which could ruin the tone and gain structure if it was just a generic boost. Nor does it boost the harsh top end at all... the result is the amp does not overdrive much too soon with the deep boost engaged... but it does fatten the tone by a large amount. The circuit works similarly to an old fashioned "loudness" control, seen in vintage audio gear, but it is tuned for harp players and adds big bump in lower frequency roundness without adding unusable top end gain. Under the chassis and next to the first preamp tube is a mini-toggle Boost switch that does, in fact, boost or cut the overall gain of the preamp section by quite a bit, depending on which way you flip the switch. This is a wonderful feature if you happen to have an overly powerful microphone where you just love the tone of it but, the Mic's output signal causes any other amplifier previously used, to distort too soon. The DEEP and BOOST features are a "must have" for players using multiple microphones. However, if you still need the extra volume a PA provides in a large venue, another great feature the Chicago 32-20 has is a "Output transformer, power tube and speaker" tone sampling circuit with a variable level, Line Out control. Any standard 1/4 inch instrument cable can be connected to the chassis mounted line out jack so the amp can be plugged into your PA's input. The max audio output through the line out jack is about 800mvac, so, with careful use, it can even run another power or combo amp if desired. Contact me via email if you have any questions and I wilbe glad to talk about it. sales@missionamps.com Bruce Collins Mission Amps |
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Mission Amps, Denver, CO (303) 955-2412 sales@missionamps.com |
