EMS

“Three generations of classic British rock tones in one amp.” – Dr. Z

Specifications

Power Output50 Watts
Output Tubes2 – EL34 (fixed bias)
Preamp Tubes3 – 12AX7
RectifierSwitchable 5U4GB tube and solid state diodes
ControlsGain, Volume, Treble, Middle, Bass, Presence
Other8, 16 Ohm outputs
Hi/Lo sensitivity switch
“Touch” sensitivity switch
Tube/Solid State rectifier switch
NEW FOR LEGACY EDITION!
Metro “Zero Loss” FX Loop
ConfigurationsHead*, 2×12 “Bluesbreaker” Combo (w/ Celestion Greenbacks)

*matching 2×12 fullback cabinet with Celestion Creamback and H30 speakers available at special price when ordered together.

Dimensions & WeightHead*: 23 5/8″ W, 9 5/8″ H, 9 1/4″ D, 30 lbs.

*matching fullback 2×12 cabinet: 24” H, 24” W, 10” D, 53 lbs.

2×12 “Bluesbreaker” Combo: 32 1/4″ W, 23 1/8″ H, 10 1/2″ D; 68 lbs.

Owner’s ManualDownload

General Information

Our goal with the latest Dr. Z amp, the EMS, was to produce the essential sounds of 3 generations of classic British amplifiers. Starting with the mid-60s JTM 50 variant, we combine a dual EL-34 power section with a tube rectified power supply, available by selecting “tube” via the rectifier switch on the back panel. Along with the tube rectifier, setting the EMS’ sensitivity switch to “low” and “Touch” response switch to the down position, this combination will produce the bloom and feel of the early American tweed amps but with the British charm of EL-34 output tubes.

Flashing forward to the 70s, the essence of the “small box” JMP amp is available in the EMS by selecting the “solid state” rectifier via the back panel, selecting “low” sensitivity, and using the “Touch” switch to match the amplifier with your choice of guitar. Using the same circuit topography of the JTM series, only with a more powerful solid state power supply, this sound is noted for its lightning quick response and cutting “kerrang” in the upper midrange.

The EMS incorporates the cascaded gain stage design found in the 80s JCM series. By using the “high” sensitivity switch on the front panel, and selecting solid state rectification, hard rock and classic metal tones with tight bass response and singing gain will come screaming out of your guitar. We massaged the circuit to remove some of the annoying, persistent high-treble this era of amplifier has been maligned for and boosted the gain a bit further so that more “modern” drive tones are available higher on the gain knob.

New for the LEGACY EDITION of the EMS! The much requested Metro “Zero Loss” FX loop has been included to seamlessly integrate your time-based and modulation effects. Adding delay to your soaring leads or a massive chorus to your chords is as simple and plugging in two instrument cables.

The EMS, like all Dr. Z amplifiers, is 100% hand-wired in Maple Heights, OH using select components throughout its stages and built on a custom rolled aluminum chassis. It has a precise copy of the Drake 784-139 50-watt output transformer for authentic British crunch. For a perfect match to the EMS head, we have our 2×12 cabinet loaded with a Celestion Creamback 65M speaker and a Celestion G12 H30 70th Anniversary speaker wired in series for 16 ohm. As a combo, the EMS is available in an open-back, 2×12 cabinet with 25 watt Celestion Greenbacks. This cabinet is modeled after the classic JTM 45 “Bluesbreaker” combo and is available in black with gold trim.

Reviews

Guitar Player reviews the EMS in the 2×12 “Bluesbreaker” combo configuration.

Sounds

Strat - Clean

Strat – Clean

Recorded with a Strat and SE VR-1 Ribbon on a Z-BEST 2×12.

Strat - Dirty

Strat – Dirty

Recorded with a Strat and SE VR-1 Ribbon on a Z-BEST 2×12.

Tele - Dirty

Tele – Dirty

Recorded with a Tele and SE VR-1 Ribbon on a Z-BEST 2×12.

Humbuckers - Dirty

Humbuckers – Dirty

Recorded with a PRS DGT and SE VR-1 Ribbon on a Z-BEST 2×12.

EMS LEGACY EDITION starting at $2399!

  • LEGACY ORDERS ARE AVAILABLE TO THE CONTIGUOUS UNITED STATES ONLY. SHIPPING PRICE IS NOT INCLUDED.
  • LEGACY AMPLIFIERS ARE BACKED BY A LIFETIME WARRANTY TO THE ORIGINAL OWNER (NON-TRANSFERABLE, 90 DAY WARRANTY OF TUBES).
  • ALL LEGACY DIRECT ORDERS REQUIRE A $500 DEPOSIT TO INITIATE THE BUILD. AN ESTIMATED SHIPPING QUOTE WILL BE INCLUDED WITH THE DEPOSIT INVOICE. THE INITIAL DEPOSIT CAN BE MADE BY PAYPAL, CHECK, OR MONEY ORDER.
  • ALL PAYMENTS AND DEPOSITS ARE NON-REFUNDABLE, NON-TRANSFERABLE, AND NON-NEGOTIABLE.
  • LEAD TIME IS 6-8 WEEKS (DEPENDING ON WORK LOAD AND PARTS AVAILABILITY).
  • THE REMAINDER OF THE PAYMENT IS DUE UPON COMPLETION AND A FINAL SHIPPING CHARGE WILL BE QUOTED BEFORE SHIPMENT OF THE AMPLIFIER.

Disclaimer: while the information contained on this page is correct at the time of publication, due to our policy of constant improvement and development, Dr. Z Amplification reserves the right to alter specifications without prior notice.
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