Here's some old school goodness from MTX's good old days! Thunder 275x amplifier. Amp, for it's age, is in really nice condition as you'll see in the pics below. This would work very well on a set of components or sub(s). Amps were underrated from their specs and typically produced a decent bit more output than their ratings.
Specs:
* 18dB/octave, continuously variable crossover with reverse outputs. For example, when you have the crossover set to low-pass, you have a high-pass output. This makes it much easier to connect multi-amplifer systems.
* Individual Gain Controls to center up the soundstage.
* Giant MOSFETS (we're not exaggerating - they're huge). A larger MOSFET means power supply stability, and a more reliable product.
* 8 Volt RMS Input - This large signal capability allows for better integration with high voltage output source units, increased dynamic range, and better Signal-to-Noise ratio in the audio system.
* Continuously Adjustable Thunder EQ bass boost, centered at 40Hz. To severely boost the low-end, and the attention you get from other drivers and innocent bystanders.
* Unique Split Shield bottom plate design, reduces electromagnetic interference, to improve signal-to-noise ratio and reduce distortion. This design is so hot, we patented it so others can't leech off our genius. (Patent # 5,521,792)
* ISO-FEET TM nylon mounting feet, eliminate the possibility of chassis-to-chassis ground noise. Leeches beware, this one's patented too.
RMS Power measured at 12.5 Volts DC:
37.5 Watts x 2 into a 4 Ohm load with less than 0.05% Thd+N
75 Watts x 2 into a 2 Ohm load with less than 0.1% Thd+N
150 Watts bridged into a 4 Ohm load with less than 0.1% Thd+N
Dynamic Power (IHF-202 Std) measured at 14.4 Volts DC
85 Watts x 2 into a 4 Ohm load
140 Watts x 2 into a 2 Ohm load
280 Watts bridged into a 4 Ohm load
Signal to Noise Ratio:
> or = 110dB A-Weighted
Damping Factor:
>200
Frequency Response:
20Hz-20kHz±0.25dB
Thunder EQ:
Variable Bass Boost (0-18dB) centered at 40Hz
Crossover:
Variable 50Hz to 200Hz, 18dB/Octave, High Pass or Low Pass Configurable
Dimensions
8" x 9" x 2" (20.3cm x 22.8cm x 5cm)
9-1/4" x 9" x 2" (23.5cm x 22.8cm x 5cm) Including IsoFeet
60 bucks shipped!
MTX Thunder 5000 10 inch subs. These are literally in NIB condition. Tested and work fine. If I had the original boxes you'd be hard pressed to argue these weren't brand new!
Specs:
Thunder5000, 10" 4 Ohm Subwoofer
* EPDM Gasket
* MTX Embossed Polypropylene Dustcap
* Gold Plated Terminals
* 2" Voice Coil on Black Kapton Former
Provides High Power Handling
* Asymmetrical Linear Drive System
Improves Linearity and Lowers Distortion
* Flat Progressive Spider
For Lower Distortion
* Extended Vented Pole Piece
Provides a more symmetrical magnetic field
* 33 oz Strontium Ferrite Magnet
For High Efficiency
Free Air Resonance Fs 33.4 Hz
Volume Acoustic Suspension Vas 1.42 Ft^3 (40.2 l)
Total Q Qts .54
Electrical Q Qes .56
Mechanical Q Qms 14.02
DC Resistance Re 3.21 Ohm
Linear Excursion (One Way) Xmax .37” (9.4 mm)
Effective Piston Diameter D 8.350” (.2121 m)
RMS Power Handling RMS 250 Watts
Total Power Handling Total 500 Watts
Sensitivity 1W/1m SPLo 87.0 dB
Reference Efficiency No 0.26%
Frequency Response 33 -150 Hz
Voice Coil Inductance Le 2.4 mH
Gap Height .312” (7.9 mm)
Voice Coil Height .961” (24.4 mm)
Motor Force BL 10.91 Tm
Compliance Cms .229 mm/N
Total Moving Mass Mms 99.0 g
Moving Mass of Driver Mmd 95.2 g
Suspension Losses Rms 1.48
Effective Surface Area Sd 54.8 in^2 (.0353m^2)
Mounting Diameter 9 1/16” (230.2 mm)
Overall Diameter 10 5/16” (261.9 mm)
Mounting Depth 5 1/16” (128.6 mm)
Overall Depth 5 1/2 ” (139.7 mm)
Speaker Displacement (Inside Box) 140in^2 (2.3 l)
Speaker Displacement (Outside Box) 105in^2 (1.7 l)
90 bucks shipped for the pair!
Specs:
* 18dB/octave, continuously variable crossover with reverse outputs. For example, when you have the crossover set to low-pass, you have a high-pass output. This makes it much easier to connect multi-amplifer systems.
* Individual Gain Controls to center up the soundstage.
* Giant MOSFETS (we're not exaggerating - they're huge). A larger MOSFET means power supply stability, and a more reliable product.
* 8 Volt RMS Input - This large signal capability allows for better integration with high voltage output source units, increased dynamic range, and better Signal-to-Noise ratio in the audio system.
* Continuously Adjustable Thunder EQ bass boost, centered at 40Hz. To severely boost the low-end, and the attention you get from other drivers and innocent bystanders.
* Unique Split Shield bottom plate design, reduces electromagnetic interference, to improve signal-to-noise ratio and reduce distortion. This design is so hot, we patented it so others can't leech off our genius. (Patent # 5,521,792)
* ISO-FEET TM nylon mounting feet, eliminate the possibility of chassis-to-chassis ground noise. Leeches beware, this one's patented too.
RMS Power measured at 12.5 Volts DC:
37.5 Watts x 2 into a 4 Ohm load with less than 0.05% Thd+N
75 Watts x 2 into a 2 Ohm load with less than 0.1% Thd+N
150 Watts bridged into a 4 Ohm load with less than 0.1% Thd+N
Dynamic Power (IHF-202 Std) measured at 14.4 Volts DC
85 Watts x 2 into a 4 Ohm load
140 Watts x 2 into a 2 Ohm load
280 Watts bridged into a 4 Ohm load
Signal to Noise Ratio:
> or = 110dB A-Weighted
Damping Factor:
>200
Frequency Response:
20Hz-20kHz±0.25dB
Thunder EQ:
Variable Bass Boost (0-18dB) centered at 40Hz
Crossover:
Variable 50Hz to 200Hz, 18dB/Octave, High Pass or Low Pass Configurable
Dimensions
8" x 9" x 2" (20.3cm x 22.8cm x 5cm)
9-1/4" x 9" x 2" (23.5cm x 22.8cm x 5cm) Including IsoFeet
60 bucks shipped!
MTX Thunder 5000 10 inch subs. These are literally in NIB condition. Tested and work fine. If I had the original boxes you'd be hard pressed to argue these weren't brand new!
Specs:
Thunder5000, 10" 4 Ohm Subwoofer
* EPDM Gasket
* MTX Embossed Polypropylene Dustcap
* Gold Plated Terminals
* 2" Voice Coil on Black Kapton Former
Provides High Power Handling
* Asymmetrical Linear Drive System
Improves Linearity and Lowers Distortion
* Flat Progressive Spider
For Lower Distortion
* Extended Vented Pole Piece
Provides a more symmetrical magnetic field
* 33 oz Strontium Ferrite Magnet
For High Efficiency
Free Air Resonance Fs 33.4 Hz
Volume Acoustic Suspension Vas 1.42 Ft^3 (40.2 l)
Total Q Qts .54
Electrical Q Qes .56
Mechanical Q Qms 14.02
DC Resistance Re 3.21 Ohm
Linear Excursion (One Way) Xmax .37” (9.4 mm)
Effective Piston Diameter D 8.350” (.2121 m)
RMS Power Handling RMS 250 Watts
Total Power Handling Total 500 Watts
Sensitivity 1W/1m SPLo 87.0 dB
Reference Efficiency No 0.26%
Frequency Response 33 -150 Hz
Voice Coil Inductance Le 2.4 mH
Gap Height .312” (7.9 mm)
Voice Coil Height .961” (24.4 mm)
Motor Force BL 10.91 Tm
Compliance Cms .229 mm/N
Total Moving Mass Mms 99.0 g
Moving Mass of Driver Mmd 95.2 g
Suspension Losses Rms 1.48
Effective Surface Area Sd 54.8 in^2 (.0353m^2)
Mounting Diameter 9 1/16” (230.2 mm)
Overall Diameter 10 5/16” (261.9 mm)
Mounting Depth 5 1/16” (128.6 mm)
Overall Depth 5 1/2 ” (139.7 mm)
Speaker Displacement (Inside Box) 140in^2 (2.3 l)
Speaker Displacement (Outside Box) 105in^2 (1.7 l)
90 bucks shipped for the pair!
