Warranty Policy

All premium vacuum tubes sold by us come with warranty coverage against manufacturing defects.

Warranty Coverage

What is Covered

Our warranty covers:

Manufacturing defects in materials or workmanship
Tubes that fail prematurely under normal use
Defects that appear within warranty period
Matching accuracy as stated in certificate

Warranty Period

90 days from date of purchase
Covers manufacturing defects only
Requires proof of purchase
Professional installation recommended

What is NOT Covered

Exclusions

This warranty does not cover:

Normal wear and tear
Tubes damaged by improper installation
Damage from incorrect bias settings
Damage from power surges or electrical issues
Tubes used beyond rated specifications
Physical damage or abuse
Tubes modified or repaired by others
Consequential damages to equipment

Improper Use

Warranty is void if tubes are:

Installed in incompatible equipment
Operated outside specifications
Damaged during installation
Used in commercial applications (unless specified)

Warranty Claim Process

Step 1: Contact Us

Email support with order number
Describe the issue in detail
Provide date of purchase
Include photos if applicable

Step 2: Verification

We may require:

Professional technician verification
Test results or measurements
Photos of tube and equipment
Description of symptoms

Step 3: Return Authorization

If claim is approved:

RMA number will be issued
Return shipping instructions provided
Packaging requirements specified

Step 4: Inspection

Upon receiving returned tubes:

Professional inspection conducted
Defect verified
Cause of failure determined
Decision made within 5 business days

Step 5: Resolution

If warranty claim is approved:

Replacement tubes shipped at no charge
Or full refund issued
Return shipping costs covered by us

If claim is denied:

Detailed explanation provided
Tubes returned to customer
Customer pays return shipping

Professional Installation Required

Recommendation

We strongly recommend professional installation for:

High-voltage tubes (845, 805)
Amplifiers requiring bias adjustment
Complex tube configurations
First-time tube replacement

Why It Matters

Professional installation:

Ensures correct installation
Prevents damage from user error
Validates warranty claims
Protects your equipment

DIY Installation

If you install tubes yourself:

Follow manufacturer instructions carefully
Verify compatibility before installation
Use proper safety precautions
Document installation process
Warranty may be affected if improper installation is evident

Bias and Setup

Bias Adjustment

Many amplifiers require bias adjustment:

Must be performed by qualified technician
Incorrect bias voids warranty
Bias should be checked regularly
Keep records of bias settings

Break-In Period

New tubes require break-in:

20-50 hours of normal use
Performance improves over time
Don't judge sound quality immediately
Not a warranty issue

Matched Sets

Matching Guarantee

Our matched tubes are guaranteed to:

Meet stated matching tolerance
Perform as a balanced set
Match specifications on certificate

If Matching is Off

If tubes don't match as specified:

Contact us with test results
Provide matching certificate
We will verify and replace if needed

Single Tube Failure in Set

If one tube in matched set fails:

Entire set may be replaced
Or single tube with matching data
Your choice based on preference

Shipping for Warranty Claims

Outbound Shipping

For approved warranty claims:

We pay shipping for replacement
Expedited shipping available
Tracking provided

Return Shipping

For returning defective tubes:

We provide prepaid return label
Use original packaging if possible
Insurance included

Extended Use

Beyond Warranty Period

After 90-day warranty expires:

Tubes may still be functional for years
Normal lifespan: 2,000-5,000 hours
Gradual performance decline is normal
Not covered by warranty

Tube Life Expectancy

Typical lifespan by type:

Small signal tubes: 5,000-10,000 hours
Power tubes: 2,000-5,000 hours
High-power tubes (845, 805): 2,000-3,000 hours
Varies based on usage and conditions

Record Keeping

Keep These Documents

Original purchase receipt
Matching certificates
Installation records
Bias adjustment records
Any correspondence with us

Why Records Matter

Proper documentation:

Speeds warranty claims
Proves purchase date
Shows proper maintenance
Validates installation

Limitations

Liability Limits

Our liability is limited to:

Replacement of defective tubes
Or refund of purchase price
No consequential damages
No equipment repair costs

No Other Warranties

This warranty is in place of all other warranties, express or implied, including merchantability or fitness for particular purpose.

International Customers

Warranty Coverage

Same warranty applies worldwide, but:

Customer pays return shipping
Customs duties may apply
Longer processing times
Contact us before returning

Transferability

Non-Transferable

This warranty:

Applies only to original purchaser
Requires proof of purchase from us
Cannot be transferred to subsequent owners
Applies only to tubes purchased directly from us

Contact for Warranty Claims

Email: [email protected]

Include:

Order number
Date of purchase
Description of issue
Photos if applicable
Technician report if available

Response Time: Within 1-2 business days

Our Commitment

We stand behind our premium vacuum tubes. If you experience any issues within the warranty period, we will work with you to resolve them quickly and fairly.

Quality and customer satisfaction are our top priorities.

Questions?

If you have questions about warranty coverage or need to file a claim, contact us. We're here to help ensure you get the performance you expect from our premium tubes.

Last Updated: May 2, 2026