Yes, a Sony STR-6120 Bluetooth connection needs no soldering. Best path: a Bluetooth receiver with RCA output into the AUX input (170 mV line level, with DIN at the same figure, per the manual transcription). If AUX is taken, use a Tape loop. Rated 60 W/ch into 8 ohms with a 15 Hz-120 kHz response, it is the early-seventies Sony this archive's STR-6065 and STR-7055 shelf sits beside.
Figures on this page were checked September 2026. Every table row carries its source; the source page carries two specification blocks and this profile documents the receiver block, disclosing the other.
Spec snapshot
| Item | Value | Notes | Source |
|---|---|---|---|
| Production run | 1969–1971 | Dated 1969 per the manual transcription; 1969-1971 per hifi-wiki; approx. 3,095 DM | HE, HW |
| Power output | 60 W/ch @ 8 Ω | Per the manual transcription, with a dealer listing in agreement; FR 15 Hz-120 kHz at 0.2% THD | HE, dealer |
| Phono input | 1.5 mV (MM) | S/N 70 dB; the DIN tape input is rated at the same 170 mV as line | HE |
| Line inputs | AUX · Tape · DIN | AUX/line 170 mV, DIN 170 mV; Pre Out 3.5 V | HE |
| Speakers | 4-16 Ω load | Weight 15.5 kg; dimensions 483 × 145 × 405 mm | HE |
Source codes: HE HiFi Engine manual transcription (Wayback snapshot) · HW hifi-wiki.com · RM radiomuseum.org. Data as of September 2026. The transcription page carries a second specification block with figures this profile does not use; see the disclosure below.
Where to connect
AUX input
RecommendedOne always-active line input at 170 mV, with the DIN tape connection rated the same. A line-level Bluetooth receiver with RCA output drives it cleanly; 170 mV is the highest AUX figure documented in this archive's Sony set.
Tape monitor loops
Good alternativeThe tape chain carries record outputs at 170 mV (line) and 20 mV (DIN), with Pre Out at 3.5 V for a separate amplifier. Feed a loop's play jacks, select the tape position to listen, and switch the monitor back off for the other sources.
Phono input
Not for line-levelThe MM phono stage expects a cartridge's 1.5 mV. Line-level Bluetooth output would overload it, and the turntable would lose its input.
Set up in three steps
- Pick AUX
Keep the tape loops free for recorders; 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
- The turn-of-the-decade Sony (verified): the sources checked date this receiver within 1969-1971, and it predates the mid-seventies Sonys this archive documents elsewhere; hifi-wiki's entry carries no technical-data table, which is why the manual transcription leads this record.
- A source page with a hidden spec block (verified): the HiFi Engine page source carries an additional specification block, commented out of the rendered page, whose figures (123 W, 0.1 mV MM, 0.18 kg weight) do not describe this receiver; this profile documents the rendered block and records the anomaly rather than quoting either indiscriminately.
- Power quoted more than one way: 60 W/ch per the transcription, with a dealer listing in agreement, and radiomuseum's German note quoting 2 × 90 W sinus for the output stage, recorded at an earlier check and not re-fetchable at fact-check time. The 60 W transcription is the per-channel figure this page carries.
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
Plug a Bluetooth receiver with RCA output into the AUX input and select AUX. If AUX is occupied, use a Tape input through the tape monitor. No internal modification is needed.
Per the manual transcription: AUX/line 170 mV, DIN 170 mV, and MM phono 1.5 mV, with signal-to-noise of 90 dB on line and DIN and 70 dB on phono. Outputs run 170 mV (line), 20 mV (DIN) and 3.5 V at Pre out, into speakers of 4 to 16 ohms.
The manual transcription rates 60 W per channel into 8 ohms, with a frequency response of 15 Hz to 120 kHz at 0.2% distortion, and a dealer listing agrees on 60 WPC. Radiomuseum's German note separately quotes 2 × 90 W sinus for the output stage; both figures stay on record.
The manual transcription dates it to 1969 and hifi-wiki to 1969-1971, so the honest answer is the turn of the decade, with 1970 as the safest single year to quote.
blafili B3 Bluetooth Music Receiver
RCA + XLR + optical out, LDAC and aptX HD, OLED status display. Matches the STR-6120 line-level inputs without adapters.
- Specifications (60 W/ch into 8 ohms; FR 15 Hz-120 kHz at 0.2% THD; AUX/line 170 mV, DIN 170 mV, MM 1.5 mV; S/N 70/90/90 dB; outputs 170 mV line, 20 mV DIN, 3.5 V Pre out; speakers 4-16 ohms; dimensions 483 × 145 × 405 mm; weight 15.5 kg; year 1969; downloads include brochure, instruction/owners manual, service manual, service bulletin 13 and supplement 1): HiFi Engine, Sony STR-6120 manual page (hifiengine.com, bot-gated to direct fetches; verified via Wayback snapshot 20250823162516), accessed 2026-09-25
- Production years 1969-1971, approx. 3,095 DM: hifi-wiki.com/index.php/Sony_STR-6120, accessed 2026-09-25; note this page carries no technical-data table
- Radiomuseum entry (radiomuseum.org/r/sony_str_6120.html) as recorded at an earlier check on 2026-09-25: model year 1970/1971 and a German note quoting "2 x 90 Watt Sinus an 8 Ohm"; the entry requires registration and could not be re-fetched at fact-check time. A dealer listing quoting 60 WPC agrees with the transcription