Delta 88
Note: Production of this amp was suspended in April 2006.
Dr. Z Amplification is proud to release its most powerful Guitar amp to date, the Delta 88. It follows in the line of Dr. Z's award winning EF-86, three control, short chassis amp designs.
The Delta 88 will take its place on top the Dr. Z "short chassis" list, which includes:
Z-28 at 26 watts,
Route 66 at 32 watts,
KT-45 at 45 watts,
Delta 88 at 88 watts.
The Delta 88 has a broad balanced power band, it was designed to output 32 watts of the fullest, sustaining, 3 dimensional clean tones this side of a 100 watt Plexi.
The cleaner settings are perfect for single speaker cab, smaller club usage along with a nice overdrive pedal. This will allow you to take control of a smaller stage, with a compact sized amp setup. With power to spare, all you have to do is reach back and turn up as you need it.
The output power grows to a peak 88 watts at full clip. It reaches this level in smooth linear steps. Never does the tone get harsh or biting. Using the Delta 88 with multiple speaker cabs will get the hairs on the back of your neck standing. Whether it's on a large/festival type stage with a big back line, or arena style back stage mic'd, the Delta 88 will fit the venue.
Durability is built into the Delta 88 design.
Prior to the release of this amp, the first units endured 15 months of rugged on the road usage by the "Big Man," Alligator Recording Artist Michael Burks.
Michael's high-powered 3 1/2 hour sets, (in keeping with Blues greats of the past), are a grueling test for other lesser designed amplifiers. (Michael should know he has used them all.) The Delta 88 has stood up to the challenge , without a failure.
The Delta 88 is a fully tested, finalized design which carries a Limited Lifetime Warranty to the original owner.
Specifications
Power Output: 88 watts full clipped power / 32 watts clean headroom
Output Tubes: 2- KT88
Preamp Tubes: 1 - EF-86
Rectifier: Solid State
Controls: Volume, Bass, Treble.
Configurations: Head
Colors: Black, Blonde, Red. Other custom wood finishes are available.
Dimensions: 17 1/2" W, 9 7/8" H, 9 1/2" D
Weight: 22 lbs
Mazerati
Note: Production of this amp was suspended in April 2006.
The first Mazerati was custom built for a customer who wanted a "higher powered Carmen Ghia."
Brad Paisley with a pair of Mazeratis and a Maz 18 Junior
With four EL-84s, the Mazerati was twice the power as the Ghia, and sounded very nice. It was good on its own. Then, Country Music star Brad Paisley requested a replacement for his aged Vintage Vox AC-30, and the evolution of the Mazerati began.
The Evolution of the Mazerati.
Dr. Z says, "I had read in the Mullard Design Manual about a technique of using a split load cathode bias setup. Since Mullard is responsible for the best sounding EL-84's, I took their advice. All cathode biased amps generate the bias voltage from one resistor, so the average of the four tubes is summed together to form the bias voltage. The split load setup uses two larger valued resistors to split the set of outputs and generates a more accurate bias voltage. Now both halves of the output rise to a more balanced symmetry, giving a balanced tone with increased sustain. This setup also eliminates the need for perfectly matched "Quads" of EL-84s.
The next step was to upgrade the power transformer by a factor of three. This increased the bandwidth of the amp, firmed up the low-end response, and gave the amp a perfect string to string balance with totally opened up the tone of the amp.
After that, I increased the Global Negative Feedback for a touch more clean headroom. The Mazerati uses tru Global Feedback, which is injected into the first preamp tube.
Finally, I increased the power supply filtering to eliminate any hint of Ghost Notes, and to increase the dynamic response.
Specifications
Power Output: Approximately 35 Watts
Output Tubes: 4 - EL-84
Preamp Tubes:1-5751, 1-12ax7
Rectifier: 1 - 5AR4
Controls: Volume, Tone. What more do you need?
Configurations: Head, 1-12 and 2-12 Combo
Colors: Black, Red, Camel. Other custom wood finishes are available.
Dimensions and Weight:
Head: 19" W, 9 3/4" H, 9 1/2" D; 22 lbs.
1-12 and 2-10 combo: 23" W, 20 1/8" H, 10" D; 47 lbs.
2-12 combo: 27 1/2" W, 22 1/8" H, 10" D; 65 lbs.
Prescription
NOTE: as of Fall 2004, this amp is no longer in production. It has been replaced by the Prescription Extra Strength.
The Prescription is one of the Doctor's first amps, and its reputation will allow it to be one of the most popular Dr.Z amps for years to come. Players across the country have sung its praises, critics have gushed, and the word has spread. The Prescription is a British-voiced amplifier with its own distinct personality.
The tone of this amp screams rock and roll when cranked, but when clean, its bell-like tone and piano-like clarity on the low notes gives excellent articulation on complex chords. The Prescription is complex and rich in harmonics, and gives incredible touch sensitivity and string-to-finger feel. So whether you're looking for clean and pretty, or crunch of doom for some rippin' blues slide, the 'Script may be the amp for you.
Specifications
Power Output: 45 Watts
Output Tubes: 4 - EL84
Preamp Tubes: 3 - 12AX7
Rectifier: 1 - GZ34
Controls: Volume, Treble, Mid, Bass, 3 way bright switch, expand switch, and footswitch Boost.
Configurations: Head, 2-12 Combo & 1-12 Combo
Colors: Black. Other custom wood finishes are available.
Dimensions and Weight:
Head: 19" W, 9 3/4" H, 9 1/2" D; 22 lbs.
1-12 combo: 23" W, 20 1/8" H, 10" D; 47 lbs.
2-12 combo: 27 1/2" W, 22 1/8" H, 10" D; 65 lbs.
6545
Note: Production of this amp was suspended in April 2006.
The 6545 is our first channel-switching guitar amplifier. Dubbed the 6545, the amp combines two proven amp designs in one channel switching amp head. The amp incorporates the 1990 design of the high gain SRZ-65 with the more recent KT-45.
Each hand-wired, point-to-point pre-amp has it's own set of non-interacting controls; adjusting one channel's settings does not affect the other. The power section uses modified power transformers to a pair of EL-34 power tubes, and operates in an ultralinear Class A/B mode.
"Dr. Z", states: "The SRZ-65 has been a proven cascaded-gain amp for over a decade. Now, by coupling the smooth overdrive from te SRZ-65 to the punchy tones from the EF-86 based KT-45, you've got the best of both worlds. Jump from singing high-gain leads to punchy driving rhythm tones with the click of a footswitch."
The 6545 is graced with a new white front panel, providing great contrast to the original black "chicken-head" knobs. Finishing the look is an amethyst jewel light, and a blue LED channel indicator.
Specifications
Output Tubes: 2 - EL-34
Preamp Section: two independent channels, based on the SRZ-65 and the KT-45
Rectifier:
Controls: Channel 1 (KT-45): Treble, Bass, Volume. Channel 2 (SRZ-65): Bass, Mids, Treble, Master, Gain.
Configurations: Head
Colors: Black
Dimensions: 19" W, 9 3/4" H, 9 1/2" D; 22 lbs.
Weight: 22 lbs.