How to Modernize Vintage Hi-Fi on a Budget

TL;DR

Add a DAC or streaming preamp to connect an old stereo to modern sources such as a smart TV, phone, streaming service, or digital player. The $150 Fosi Audio ZD3 combines Bluetooth, HDMI ARC, digital inputs, volume control, and preamp functionality, while the $330 WiiM Ultra adds streaming, EQ, bass management, a subwoofer output, room correction, and a phono stage.

Transcript

you have a beautiful vintage or old stereo or integrated amplifier what can you do well there are a bunch of cheap accessories that you can hook up to your old tired but wonderful two channel stereo system to make it more modern and today we're going to talk about these products how you can use them and how it's going to make your life better it's ... Read More

Key Insights

• The Fosi Audio ZD3 is a $150 DAC that adds Bluetooth, HDMI ARC, coaxial, optical, and USB connectivity to an older stereo. It also provides RCA and balanced outputs, plus volume control for use as a digital preamp connected directly to a power amplifier.
• HDMI ARC is a practical bridge between a modern television and vintage audio equipment. Connecting the television to an external DAC and sending its analog output to the stereo enables television, movie, and smart TV app audio to play through the older system.
• An external DAC can improve the output of an older CD or DVD player when that player has a coaxial or optical digital output. The source functions as a disc transport, while the newer external DAC performs the digital-to-analog conversion.
• The SMSL PS100 is a $30 DAC for users who primarily need HDMI, optical, or coaxial connectivity. It lacks Bluetooth and volume control, and its sound is described as inferior to the Fosi Audio ZD3, but it offers an inexpensive route from a smart TV to a vintage receiver.
• The WiiM Ultra is a $330 streaming preamp with Spotify Connect, Tidal Connect, album-art display, Bluetooth, analog and digital connections, a phono stage, equalization, room correction, bass management, and a subwoofer output. Apple Music is identified as the notable unsupported streaming service.
• Bass management is especially valuable with vintage receivers because they commonly lack dedicated subwoofer outputs. The WiiM Ultra can apply a high-pass filter to the main speakers and a low-pass filter to its subwoofer output, avoiding reliance on a subwoofer with speaker-level inputs.
• A $60 digital-to-digital converter can accept USB output from the WiiM Ultra and convert it to optical, coaxial, or I2S for another DAC. The presenter reports that its improved clocking produces clearer instrument separation and more definite spatial placement, while acknowledging that the claim is controversial.
• Correctly sized cables and connection adapters can make an older system easier to use and organize. Short RCA and IEC cables reduce excess coils, right-angle optical adapters help in tight spaces, and spade-to-banana or pin-to-banana adapters simplify speaker connections on older terminals.

Questions & Answers

Q: How can I add modern inputs to a vintage stereo?

Connect an external DAC or streaming preamp to an available analog input on the vintage stereo. The Fosi Audio ZD3 adds Bluetooth, HDMI ARC, coaxial, optical, and USB inputs, then sends analog audio through RCA or balanced outputs. This arrangement supports phones, televisions, computers, and digital players without requiring replacement of the original amplifier or receiver.

Q: What does the Fosi Audio ZD3 add to an old hi-fi system?

The Fosi Audio ZD3 adds Bluetooth, HDMI ARC, coaxial, optical, and USB inputs for $150. It includes RCA and balanced analog outputs and can control volume when a digital input is used. That volume control allows it to serve as a digital preamp connected directly to a power amplifier, as well as a conventional DAC feeding a receiver.

Q: How can I connect a smart TV to a vintage receiver?

Connect the television's HDMI ARC output to a compatible external DAC, then connect the DAC's RCA outputs to an analog input on the vintage receiver. The $30 SMSL PS100 provides HDMI, optical, and coaxial inputs for this purpose. Once connected, television programs, movies, and music apps available on the smart TV can play through the vintage audio system.

Q: Can an external DAC improve an old CD player?

An external DAC can be used when the CD player has a coaxial or optical digital output. The player reads the disc and sends its digital signal to the newer DAC, which handles conversion before passing analog audio to the stereo. The presenter says this will probably sound better for CD players that are 15, 25, 30, or 38 years old, unless the original player already contains a particularly good DAC.

Q: What is the cheapest HDMI DAC discussed for an old stereo?

The SMSL PS100 is the cheapest HDMI DAC discussed, at $30. It accepts HDMI, optical, and coaxial inputs and is powered by a 5-volt supply, such as a cell phone charger. It does not include Bluetooth or volume control, and the presenter says it does not sound as good as the Fosi Audio ZD3, but it provides inexpensive television connectivity.

Q: Why is the WiiM Ultra useful with vintage hi-fi equipment?

The WiiM Ultra combines a streamer, preamp, DAC, Bluetooth connection, analog input, phono stage, optical and coaxial connections, equalization, room correction, bass management, and a subwoofer output for $330. It supports Spotify Connect and Tidal Connect, though not Apple Music. Its digital volume control also allows direct connection to a power amplifier, making it a broad modernization option.

Q: How can I connect a subwoofer to a vintage receiver?

A streaming preamp with a dedicated subwoofer output can add the connection that many vintage receivers lack. The WiiM Ultra includes a subwoofer output and bass management, allowing a high-pass filter for the main speakers and a low-pass filter for the subwoofer. This is useful when the subwoofer does not provide speaker-level inputs, which would otherwise be needed with many older receivers.

Q: What inexpensive accessories make vintage hi-fi easier to use?

Spade-to-banana adapters, costing about $10.99 in the example, let older screw terminals accept speaker cables terminated with banana plugs. Pin-to-banana adapters can serve equipment with push-pin connections. Short RCA and IEC cables reduce excess cable behind the rack, right-angle optical connectors improve routing in tight spaces, and balanced-to-RCA cables connect newer balanced equipment to older RCA inputs.

Summary & Key Takeaways

• Vintage amplifiers can gain modern digital connectivity through an external DAC or preamp. The Fosi Audio ZD3 provides Bluetooth, HDMI ARC, coaxial, optical, and USB inputs for $150. Its RCA and balanced outputs connect to older equipment, while its volume control also lets it operate directly with a power amplifier.

• The $30 SMSL PS100 is a simpler option for connecting a smart TV through HDMI, optical, or coaxial input. The WiiM Ultra costs $330 but adds integrated music streaming, extensive equalization, bass management, room correction, a subwoofer output, analog input, phono stage, Bluetooth, and several digital connections.

• Small accessories can improve compatibility and organization without replacing vintage equipment. Spade-to-banana adapters accommodate modern speaker cables, short RCA and IEC cables reduce clutter, right-angle optical connectors simplify tight installations, and balanced-to-RCA cables bridge different connection types. MiniDSP offers extensive processing, although the WiiM Ultra is presented as easier for most users.