description manual driven by 2 lm1875 usa-made ics this amp … · 2019. 5. 1. · lm1875 class-ab...
TRANSCRIPT
![Page 1: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/1.jpg)
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XF-AMPS01 Class-AB Audio Amplifier
Features
Stereo Output
Total Output Power: 36W RMS
Volume Control
LED Power Switch
MDF Enclosure
Stand-by AC Power Draw: 3-4W
xform
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Manual
Specifications
LM1875 Class-AB IC
Load: 4Ω-8Ω/channelInput Impedance: 47k Ohm
Low Distortion: 0.015%,1kHz,20W
Wide Power Bandwidth: 70 kHz
Power Input: 120VAC 60Hz
Operating Temperature: 0-70°C
Description
This is a flat Class-AB audio Amplifier. All modules are made
using though-hole components only, that are soldered to 3mm
traces of single-sided FR-4 PCB. XF-AMPS01 is powered by
regulated dual ±DC power supply that is decoupled from main
via transformer. This unit features large capacitors, large
heat sinks, phoenix connectors and double insulated enclosure.
Driven by 2 LM1875 USA-made ICs this amp is build to last.
Table of Contents
1. Description
2. Wiring
3. Build
4. Dimensions & Weight
5. Diagrams
6. Schemas
7. THD & Freq Response
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WiringAudio Signal Input
Impedance: 47k Ohm
via 3.5mm Male to Male
Stereo Audio Aux Cable
(This cable is included)
Speaker Outputs
Optimal Load:
4Ω-8Ω per channelApplication:
PC/Bookshelf Speakers
(Speakers not included)
AC Power Input
120V AC 60Hz via Polarized Power Cable
IEC-60320 IEC320 C7 to NEMA 1-15P) 6'
(This cable is included)
XF-AMPS01 Class-AB Audio Amplifier
![Page 3: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/3.jpg)
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XF-AMPS01 Class-AB Audio Amplifier
LM1875 Channel 1 Amp
M3 Nylon Standoffs
M3 Screws
Fuse
LM1875 Channel 2 Amp
AC to ±VDC Dual Voltage PSU
Transformer Breakout
PART# XFPCB-0004Regulated LM7918 & LM1818 +18 VDC | 0 VDC | -18 VDC
PART# XFPCB-0003LM1875 Class-AB Load: 4Ω - 8Ω
PART# XFPCB-0003LM1875 Class-AB Load: 4Ω - 8Ω
PART# XFPCB-0005120V VCT Transformer(Center Tap) 18-0-18 VAC
3.5mm Input Jack
PART# XFPCB-0006
All Phoenix Connectors
MDF
IEC Polarized C8 AC Input
Class II Double Insulated
![Page 4: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/4.jpg)
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XF-AMPS01 Class-AB Audio Amplifierxform
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16 cm6.3”3.15”
9.8
5”
Volume Popentiometer
Power Button
25
cm
8 cm
Dimensions & Weight
25cm x 16cm x 8cm
9.8" x 6.3" x 3.1"
Weight 1.75kg / 3.88lb
![Page 5: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/5.jpg)
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XF-AMPS01 Class-AB Audio Amplifierxform
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Diagrams
66mm
76mm
-18 VDC
GND
+18 VDC
Regulated ±VDC
Voltage Input
Speaker
Output
Audio
Input
LM1875 Amplifier
PART# XFPCB-0003
±VDC Power Supply
PART# XFPCB-0004
+18 VDC
GND
-18 VDC
Regulated ±VDC
Voltage Output
~18 VAC
0 VAC
~18 VAC
76mm
66mm
![Page 6: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/6.jpg)
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XF-AMPS01 Class-AB Audio Amplifierxform
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Schemas
LM1875 Amplifier
PART# XFPCB-0003
Power Supply
PART# XFPCB-0004
Dual ±DC Output Power Supply
built around LM7918 & LM1818
USA-made IC regulators
Features
Input Voltage Filtering
Low Output Ripple
Voltage Stability to ±0.005VDC
![Page 7: Description Manual Driven by 2 LM1875 USA-made ICs this amp … · 2019. 5. 1. · LM1875 Class-AB IC Load: 4Ω-8Ω/channel Input Impedance: 47k Ohm Low Distortion: 0.015%,1kHz,20W](https://reader036.vdocuments.pub/reader036/viewer/2022071407/60fe90cf00aaee3d08425290/html5/thumbnails/7.jpg)
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XF-AMPS01 Class-AB Audio Amplifierxform
3XF-AMPS01 Source Files:
https://github.com/xform3
https://xform3.com
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