Oldchen (Laochen) EL34-BvsTopping PA7 Plus
A detailed side-by-side comparison of the Oldchen (Laochen) EL34-B and Topping PA7 Plus — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Oldchen (Laochen) EL34-B
Topping PA7 Plus
Class
A
D
Topology
Single Ended Triode (SET)
—
Tubes
EL34 x2, 6N9P x2, 5U4G x1
—
Power
10W x 2
2 × 245W @ 4Ω (1% THD) / 2 × 300W @ 4Ω (10% THD)
Wiring
Point-to-Point (Hardwired)
—
Chipset
—
Proprietary / Modified Class D
Sinad
—
102 dB (excellent for Class D)
Inputs
—
XLR/TRS (Balanced), RCA
Features
—
Volume Bypass (Pure Power Amp Mode), 12V Trigger
Remote Control
✗
✗
Tube Stage
✓
✗
Price (estimated)
Price
~$170
~$549
Difference
~$379.00 cheaper (Oldchen (Laochen) EL34-B)
Things to Know
Oldchen (Laochen) EL34-B
- ⚠The '5U4G' rectifier is often wired in hybrid mode with silicon diodes, which purists dislike.
- ⚠Transformers run very hot, suggesting they are pushed near their saturation limits.
- ⚠Stock Chinese EL34 tubes can sound harsh compared to budget re-issues like Mullard or JJ.
Topping PA7 Plus
- ⚠External power brick is massive and can be difficult to hide.
- ⚠Runs warmer than typical Class D amps due to high power density.
- ⚠No remote control (intended to be used with a preamp like the E70).
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