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Friedman Twin Sister 40-watt 2-channel 1x12" Tube Combo Amp Demo

40-watt, 2-channel All-tube 1x12" Guitar Combo Amplifier with Custom Transformers, 3-band EQ, Series Effects Loop, Celestion G12H-150 Redback Speaker, and Footswitch

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Condition Notes:

The item is in good condition with some signs of use, but is in perfect working order. There are heavy scratches on the foot switch. Includes all original accessories. The item ships in its original packaging which shows some signs of wear.

This item was thoroughly inspected by our factory-authorized service team and is backed by Sweetwater's exclusive 2-year warranty. The images shown do not necessarily represent the condition of this particular item.

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The 2-channel Dirty Shirley Rockers Have Been Waiting For

Ranging from smooth cleans to Friedman’s famous high-gain tones, the Friedman Twin Sister 40-watt tube combo amplifier delivers world-class performance based on the legendary JTM 45. If that sounds familiar, that's because the Twin Sister is essentially a two-channel version of their acclaimed Dirty Shirley tube amp. Whether you’re looking for clean, crunch, or molten leads, you’ll be able to dial it in. Crank up the preamp gain for modern lead tones, or back off the gain and crank the master for the explosive sound of raging 5881 power tubes. Each of the Twin Sister’s channels offers a Bright switch and three-way Gain switch that are incredibly useful for fine-tuning the amp's response for any type of pickups. Loaded with a beefy-sounding Celestion Redback G12H-150 speaker, you'll appreciate the Friedman Twin Sister’s versatility whether on stage or in the studio.

An all-tube rock ’n’ roll machine

With 40 watts of all-tube power, the Friedman Twin Sister guitar combo amplifier gives you killer classic rock tones. Ranging from shimmering cleans to slightly overdriven tones to pushed lead tones à la Zep and ZZ Top, this rock ’n’ roll powerhouse has the tones you’re looking for. A 3-position switch lowers your overall gain structure — the highest setting delivers the Dirty Shirley’s original sound while the lower two yield phenomenal vintage-tinged tones. A duo of 5881 power tubes — a favorite among Sweetwater guitarists — delivers a punchy and touch responsive sound that guitar players long for. When you’re rocking out and need to clean up your tone just roll back your guitar’s volume and keep playing.

Handbuilt for exceptional tone

All Friedman Amplification products are handwired to exacting specs to give you amazing tones every time you play. Premium components and attention to detail ensure that your Twin Sister combo amp will deliver the sound you want and need onstage or in the studio. It doesn’t matter what type of music you’re into; a premium, handbuilt Friedman amp has the tonal palette you need to create the sound you’re after.

Dave Friedman: amp guru to the pros

For over 25 years, Dave Friedman has been tweaking, building, and repairing amps for some of the biggest names in music. His legendary reputation among touring musicians has gained him a loyal clientele including the likes of Eddie Van Halen, Steve Stevens, Jerry Cantrell, and more. Dave has created his own production amp line utilizing his sought-after skills and talents. Now you can get the same legendary amp tones as the pros with the Friedman Twin Sister.

Friedman Amplification Twin Sister Guitar Combo Amplifier Features:

  • 40-watt, 2-channel all-tube amplifier with British voicing
  • 12-inch Celestion Redback G12H-150 speaker delivers powerful lows, detailed mids, and smooth highs
  • Footswitch included for channel switching
  • Bright switch and 3-position gain switch per channel, helpful for fine-tuning the amp’s response for any guitar or pickups
  • An ideal amp for rock
  • Powered by dual 5881 power tubes
  • Powerful tone-shaping potential with per-channel 3-band EQ
  • Handwired amplifier built using premium components including custom transformers and capacitors
  • Dual speaker outputs let you use up to 2 speaker cabs, with switchable 4-, 8-, or 16-ohm operation
  • Ultra-transparent series effects loop for your favorite pedals (located on back panel near the speaker jack)

What is Demo Gear?

At Sweetwater, we're so picky that what we call a "demo" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

What demo means to us is that we've had it out of the box, or maybe it was in a customer's hands for a few days and isn't "factory fresh" as a result. Every demo item we sell has Sweetwater's 2-year Total Confidence Coverage™ warranty, and has been tested and verified up to "new" specs by our factory-authorized technicians to make sure it's in perfect working order before we ship it to you.

When you buy a Demo item at Sweetwater, you get:
  • 2-year Total Confidence Coverage Warranty™!
  • Products inspected and tested by our factory-authorized techs, guaranteed to function like new (or better)!
  • FREE shipping on most items
  • Equipment that will MEET or EXCEED your expectations!

Click HERE to browse our current inventory of Demo equipment. Purchasing demo gear from Sweetwater is a smart and safe way to save!

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Tech Specs

  • Type: Tube
  • Number of Channels: 2
  • Total Power: 40W
  • Speaker Size: 1 x 12" Celestion G12H Redback
  • Preamp Tubes: 5 x 12AX7
  • Power Tubes: 2 x 5881
  • EQ: 3-band EQ, Deep, Presence, Bright
  • Inputs: 1 x 1/4"
  • Effects Loop: Yes
  • Footswitch I/O: 1 x 1/4" (channel)
  • Footswitch Included: Yes
  • Bias Type: Adjustable Fixed
  • Construction Material: Baltic Birch with Black Tolex
  • Power Source: Standard IEC AC cable
  • Height: 22"
  • Width: 24.25"
  • Depth: 9.5"
  • Weight: 52 lbs.
  • Manufacturer Part Number: Twin Sister Combo

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Customer Reviews

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Rated 5/5

The Gates of Heaven

Holy Mary, mother of God! The best clean tones I have ever heard. Capable of crushing DOOM as well. The only thing questionable for this amp is super tight, technical metal.
Keith Klikas is my sales engineer and he takes care of whatever I need. Sweetwater is the best.
Worth every penny.
Music background: Professional luthier. RS Guitarworks, Collings, Benedetto. 28 years playing music.
Rated 5/5

My Perfect Amp

In my 20's I had a Soldano Hot Rod 50 and 4x12 cab that was the best amp I've ever had. When I tired of giggling with that snakeskin monster I started using a 5150 combo, using channel 1 as a pedal platform and it worked surprisingly well that way. But it, too, was a pain to get around. Last year I sold all my large gear and was on the hunt for a 1x12 combo that could do it all. This is it. I run it with a Brown Box at 115 volts and it is the sweetest amp ever just at the edge of breakup. If I want hotter I'll hit that channel with my Bogner La Grange and it just sounds fantastic. The second channel I set the gain at 8 and max the gain and bright switches and hit it with a Buxom Boost for anything that requires extra gain. It is a crazy versatile amp and cleans up completely using just your volume knob.
Rated 5/5

Twin Sister...... Its a Fire Burner....

Got one of the Demo Combo's could not really tell it wasn't new, I have a Friedman Runt 50 but this Twin Sister Combo is in a different league. It says the Combo comes with a Celestion G12M65 Cream Back but it comes with a Celestion G12H Red Back 150 watt this thing has killer Lows. I also had an Dirty Shirly Extention 1x12 cab with The G12M65 Cream Back so I stack the Combo on that and get a great 2X12 stack.
Rated 5/5

Friedman Twin Sister Combo - WOW

I waited a long time to make this purchase. Actually discussed the amp with Dave Friedman via email. Very helpful guy to say the least. Just received the amp over the weekend and spent all day and I mean all day playing. Straight through no effects just to get a feel for what this amp can do. Blown away!!
Then ran time based effects through the loop, very clear, does not impact tone at all. No drops or noise. Added phase 90 to the front, killer.
This amp can really cover just about all music styles. Love 70's and 80's but can event hit more aggressive metal but not my thing. Will need an OD pedal to do it.
The amp is well worth the money, for me. In my late 50's so no running around playing shows anymore. This is a pro tool. Big investment for home playing but if you want best in class Friedman is it.
Shout out to my go to guy at Sweetwater, Brendan Murphy. Always takes care of the customer.
Music background: 40 plus years
Rated 5/5

Friedman Twin sister

the search is over. i have no idea what to say, if you can find one in stock some were, buy it. everything is perfect. two channels with a foot switch, enough power for a bedroom or to drown out john bonham. i didnt think my pedals would sound this good.
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