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Upgrades and Modifications

Cary Audio has been in business since 1989 offering numerous products in the high-end audio industry. We offer plenty of services, upgrades, and modifications for our current and discontinued products. We want you to be informed of these services to help you keep your Cary product at its finest! Below is a list of some of the services provided. Please contact us if you have any questions or need assistance on upgrades and modifications for your Cary Audio product. Thank you for your support.


Upgrade price does NOT include the application fee ($30), labor fee ($95/hour), or shipping costs. There is a minimum labor fee of one hour.

European Customers should contact Cary Audio Europe. Prices in US$ below are for reference only and do not include taxes, customs fees and shipping costs.


Looking for a really nice way to upgrade the sound of your amp or preamp? Upgrading the coupling capacitors will provide a sound quality improvement that is well worth the money. We offer three types of capacitor upgrades.

Jensen Copper Foil/Paper-in-Oil/Pure Silver Lead-Out Capacitors

Jensen has been making capacitors in Denmark for over 90 years. Their Copper foil oil filled capacitors are legandary for use as coupling caps. They feature a pure copper foil with pure silver lead wires. The aluminum housing is hermeticaly sealed for long life and stability. These will provide improvements in imaging, clarity, detail warmth, and texture.

Retail Price: $90.00 each

Cary Audio by ClarityCap MR Capacitors

The Cary Audio ClarityCap MR series capacitors are custom made for us by ClarityCap. The capacitors are manufactured from a non standard polypropylene film using an ultra pure aluminum metallisation. The component is housed in a colored acrylic tube and encapsulated in an epoxy resin which limits the effect of mechanical resonances within the capacitor and assists in the overall sonic performance. Upgrading your amplifier or preamplifier with the ClarityCap MR capacitors can show improvements in imaging, detail, clarity, air and bass definition, yet the ClarityCap MR series capacitors are very smooth and clean without any edge or hardness.

Retail Price: $90.00 each

HEXFRED RECTIFIERS If you have not had it done to your favorite Cary Audio piece, the Hexfred option makes an awesome difference! Hexfreds are high speed low noise rectifiers and replace your existing standard rectifiers in the power supply. You will notice more speed, air, detail, imaging and tighter bass, yet a cleaner clearer sound quality. The Hexfreds help to provide a cleaner, faster DC voltage which shows up very noticeably in the sound quality. There is one more layer of hash and hardness (noise) that is removed so that you can just enjoy the music! Bass is faster with more details and the midrange and highs are cleaner and clearer. You will hear more detail with less bite.

Retail Price: $25.00 each


The Grayhill Selector Switch is a great way to update your input selector switch, and is designed to last the life of your equipment with its mil-spec standard. Its sealed enclosure with gold plated contacts allows for smooth action, long life, and excellent conduction. It will keep your unit sound and switching perfectly for years. Works in the SLP-98, SLI-80, 300SEI, and many other Cary preamplifiers and integrated amplifiers.

Retail Price: $45.00 each


Excellent high quality WBT speaker posts for improved overall sound and connection.

Retail Price: $50.00 each


Wire CD or any other input for improved detail, resolution, and overall better sound quality. Available for the SLI-80, 300SEI, and SLP-98.

Retail Price: $125.00 per input (includes labor)


Modification price does NOT include Shipping Costs.


Allows the connection of a surround sound processor or receiver’s right and left outputs to be routed passively through the SLP-98 directly to the main right and left outputs providing convenience and signal purity. When the SLP-98 is turned off the right and left home theater inputs are connected directly to the main right and left outputs via an internal relay. This upgrade is standard for the SLP-03 and SLP-05. Added to the SLP-98L: You will loose the RCA phono inputs Added to SLP-98P: You will loose one set of main outputs.

Retail Price: $225.00 (includes parts and labor)


Converts the SLP-98L to the SLP-98P by adding the phono stage and tubes.

Retail Price: $500.00 (includes parts and labor)

LUNDAHL MC TRANSFORMERS Installed in the SLP-98P phono stage will convert the SLP-98P to a high-gain high-end quality MC input.

Retail Price: $500.00 (includes parts and labor)


We are very pleased to announce an upgrade for the PH-302 to the PH-302 MKII. The upgrade consists of including on the rear of the chassis a switch which will allow the Moving Coil (MC) section of the phono preamplifier to be adjusted from 10 ohms to 47k ohms. There will be six separate settings for this loading feature. This will allow for more optimized matching of low output phono cartridges to the PH-302 MKII. Also, the MC gain level will increase to 60dB. This will give the PH-302 MKII the ability to drive even lower output MC cartridges. In addition to the technical and sonic enhancements, the upgrade will include a new chassis that incorporates the rear panel switch for the MC adjustments and a new face plate. A new PH-302 MKII Owner’s Manual will be included in the return package with the phono preamplifier.

Retail Price: $800.00 (includes parts and labor)


There has been an upgrade to the PH-302 MKII that consists of modifying the Moving Coil (MC) gain level to 60dB from 54dB. This will allow the PH-302 MKII the ability to drive even lower output MC cartridges. The upgrade is available for all PH-302 MKII purchased prior to November 1, 2010.

Retail Price: $275.00 (includes parts and labor)


We are pleased to announce a MKII version upgrade of the CAD 120S. Building upon a solid foundation, the CAD 120S MKII incorporates a modified and improved feedback network circuitry that reduces overall global feedback, allowing for a wider soundstage with greater resolution of details. Adjustments to the input gain stage have also been added to increase dynamics while improving microdynamics. Additionally, this new input gain stage allows the new CAD 120S MKII to achieve greater volume and increases its compatibility with a wider variety of preamplifier models and brands. In addition to the technical and sonic enhancements, the upgrade will include a face plate and top cover indicating the new CAD 120S MKII model number. A new CAD 120S MKII Owner’s Manual will be included in the return package with the amplifier.

Retail Price: $600.00 (includes parts and labor)


Cary Audio is pleased to announce the availability of an upgrade to allow owners to refit their Cinema 11a to take advantage of the HDMI 1.4 standard technology. We will remove the current HDMI 1.3 connection board, along with its digital electronics, and replace it with a new board incorporating two HDMI 1.4 inputs and a pass-through output.

HDMI 1.4 inputs allow the Cinema 11a to:

  • Support most common 3D formats and coming 4K display resolutions through much higher data transmission speed.
  • Support 48-bit Deep Color at 1080p.
  • Support an Audio Return Channel (ARC) from the TV, enabling multiple sources connected via HDMI to the TV to send their fully digital audio bitstreams back to the Cinema 11a for processing.
  • Support HDMI Ethernet Channel (HEC) connectivity, allowing multiple networked devices to communicate via a 100Mbps Ethernet signal carried over their HDMI cables
  • Support HDMI CEC power on/off features:
    • Connected TV and Blu-ray player will power off when Cinema 11a is turned off.
    • When Cinema 11a in on, connected TV will power on when connected Blu-ray player is turned on.

It is very important to be able to take advantage of the latest technologies without having to reinvest in new gear every time something newer and better comes along. Cary Audio offers its products’ owners a chance to upgrade their equipment to meet the latest high-speed HDMI 1.4 specs, and makes their investment much more secure.

Retail Price: $595.00 (includes parts and labor)


We have had numerous requests from customers for many years regarding possible upgrades to the SLP-05 preamplifier. For the past couple of years, we have made it a project to find the appropriate combination of components to take the SLP-05 to another level. Finally, we believe we have achieved our goal. We are incredibly happy with the results of these upgrades which can be installed in any SLP-05, no matter the vintage. The “Ultimate Upgrade” consists of changes to the power supply as well as the line stage circuit.

The power supply portion of the upgrade consists of “maxing out” the filtering capabilities along the entire power supply chain, all the way into and including the preamplifier. Purifying DC voltages is extremely important to providing a clean, clear, smooth sound quality that is free from grain, noise and strident artifacts. This also improves imaging qualities as it provides a much blacker background. The type and quantity of capacitance are important as we are not just adding an extra 1200uf of UCC electrolytic capacitance into the main B+ (high voltage) supply but also an additional total of 125uf of Polypropylene capacitors throughout the B+ line. This includes a huge 100uf Polypropylene capacitor right at the line stage PC board. The rest of the additional capacitors are used as bypass capacitors across each UCC electrolytic filter capacitor. This provides a dramatically smooth, sweet sound quality.

In the line stage circuit, we change the resistors to high quality 1% Vishay metal film plate load and cathode resistors. This parts change improves the midrange and bass substantially for a fuller, more textured midrange. You will notice more body and texture to vocals and acoustic instruments, etc. Bass is more authoritative and tight. Highs are smoother yet detailed.

And finally, for the pièce de résistance. We are removing all of the coupling capacitors and installing (10) Mundorf MCap coupling capacitors throughout the entire line section. This is the final addition that completely allows the sound qualities of the SLP-05 to shine through, resulting in a sweet, fluid, full bodied yet delicate delivery of every single instrument and natural vocal detail. It is done without adding brightness, and yet delivers an amazing amount of air and detail revealing the acoustics of the room and instruments with breathtaking natural realism. There is body, texture and fullness to instruments that break through with such ease and delicacy no matter the complexity of the music.

The “Ultimate Upgrade” is not just an upgrade. It elevates the SLP-05 to a whole other level of sound quality. It retains the attributes of the SLP-05 that you know and love but gives you more of everything.

The complete upgrade is priced at $1,595 which includes all parts, labor, and FREE shipping back to you. If you purchase a new SLP-05, you will be able to add this upgrade when ordering.

Retail Price:  $1,595.00 (includes parts and labor)

Pricing By Unit

Price does NOT include any applicable Bench Fee ($125) or Shipping Costs.


Upgrade or Modification SL-100 SLP-98L SLP-98P SLP-05 SLI-80 CAD-300SEI CAD-120S MkII CAD-805AE (per amp) CAD-211FE (per amp)
Jensen Caps NA $90 X 2 $90 X 4 NA $90 X 4 NA $90 X 4 $90 X 3 $90 X 4
MCap SUPREME EVO SilverGold NA $90 X 2 $90 X 4 NA $90 X 4 $90 X 4 $90 X 4 $90 X 3 STD
Hexfreds NA $25 X 4 $25 X 4 NA $25 X 5 $25 X 5 $25 X 6 NA NA
Greyhill Switch NA STD STD NA $45 $45 NA NA NA
WBT NA NA NA NA $60 X 4 $60 X 4 $60 X 4 $60 X 6 $60 X 6
Kimber Kable NA $125 X 1 $125 X 1 $275 $125 X 1 NA NA NA NA
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