Yes, a Harman Kardon 730 Bluetooth connection needs no soldering. The 730 joined the Twin Powered line in 1976, built by Shin Shirasuna, and its power rating is quoted at 35 W per channel by period coverage and 40 W by secondary references, a spread this page shows rather than settles. As with its 630 sibling, the documented input-sensitivity table is not part of the record yet, so connection rows stay qualitative.
Figures on this page were checked September 2026. Every table row carries its source; the power spread and the missing input table are disclosed rather than smoothed.
Spec snapshot
| Item | Value | Notes | Source |
|---|---|---|---|
| Production run | 1976– | Added to the Twin Powered line in 1976; built by Shin Shirasuna | CR |
| Power output | 35 / 40 W/ch @ 8 Ω | 35 W per period coverage; 40 W per secondary references; both quoted | CR, secondary |
| Design signature | Twin Powered | Separate power supply for each channel, per the series identity | CR |
| Input table | Not documented | No checked source carries a 730 input-sensitivity table; connection rows stay qualitative | gap, disclosed |
Source codes: CR classicreceivers.com (Harman Kardon 630 page, cross-reference). Data as of September 2026. The model's own product page is a 404 at check time and hifi-wiki's 730 entry is a data-free stub; both are part of the record.
Where to connect
AUX input
RecommendedThe always-active high-level spare, the standard home for an external source on receivers of this class. A line-level Bluetooth receiver with RCA output connects here; this page keeps the guidance qualitative because the 730's input-sensitivity table is not part of the documented record yet.
Tape monitor loop
Good alternativeThe tape loop through the monitor switch serves the same role documented across every receiver in this archive: feed the play jacks, select tape to listen, and switch the monitor back off for the other sources.
Phono input
Not for line-levelThe phono stage expects a cartridge. A line-level Bluetooth receiver would overload it, and the turntable would lose its input.
Set up in three steps
- Pick AUX
Keep the tape loop free for a recorder; AUX is the natural Bluetooth home.
- Connect and power
Bluetooth receiver RCA out to AUX, USB power attached, pair once with your phone.
- Level check
Volume low, select AUX, then raise. Fixed/line output on the adapter if it offers the option.
Quirks and notes
- A power spread with a paper trail (verified): 35 W per channel comes from period coverage on the 630 page; 40 W comes from secondary references recorded during this site's Harman Kardon research. Neither is hidden; the buyer decides how much the difference matters.
- The Shin Shirasuna handover (verified): the 730 belongs to the 1976 batch that moved Twin Powered production to Shin Shirasuna, a manufacturing note the later 430 shares.
- New-brand shelf, second entry (verified): with the 630 documented earlier, the 730 is the second Harman Kardon in the archive, and its qualitative input rows follow the same disclosed-gap convention.
What you need
- Bluetooth receiver with RCA output, LDAC or aptX HD preferred
- 0.5–1 m RCA cable
- USB power for the receiver
FAQ
Use the AUX input for a Bluetooth receiver with RCA output and select AUX; if AUX is occupied, a tape loop through the monitor switch is the documented alternative across this class. No internal modification is needed.
That depends on which reference you quote: period coverage on the 630 page lists the 730 at 35 W per channel, while secondary references including HiFi Engine list 40 W. This page shows both with attribution instead of settling the spread.
Yes, it belongs to the Twin Powered series documented on the 630 page: a separate power supply for each channel, effectively a mono amplifier per side. The 730 was built by Shin Shirasuna, which built the 430 and 730 from 1976.
Because no input-sensitivity table for the 730 has surfaced in the sources checked. The AUX-and-tape-loop connection guidance below is the documented class convention; the numbers get added if a factory table surfaces.
blafili B3 Bluetooth Music Receiver
RCA + XLR + optical out, LDAC and aptX HD, OLED status display. Matches the 730 line-level inputs without adapters.
- Lineup and manufacturing context (the 430 and 730 added in 1976, built by Shin Shirasuna; the 730 listed at 35 W per channel in the 630 page's lineup discussion; Twin Powered series identity): classicreceivers.com/harman-kardon-630, accessed 2026-09-25
- Alternative power quotation (40 W/ch for the 730): secondary references including HiFi Engine and In Sheeps Clothing HiFi listings, as recorded in this site's Harman Kardon 630 fact-check report (2026-09-25); the classicreceivers 730-specific page returns 404 at check time, and hifi-wiki's 730 entry is a stub carrying no technical data (years 1975-1978, approx. 1,700 DM), both disclosed